in order to perform, a chemist needs an element that has similar properties to potassium (K) but has a lower atomic mass. which element should the chemist select for the experiment?
A. Robidium (Rb)
B. Sodium(Na)
C. Magnesium(Mg)
D. Calcium(Ca)
Answers
The element needed by the chemist to perform the experiment with similar properties to that of potassium, while having lower atomic mass is option B. Sodium.
If we take a look at the periodic table, we can see all the elements that share properties with potassium are located within the same column. Some examples are :
SodiumRubidiumCesium LithiumOf the elements listed, only two are found within the options for this question, which means that we can discard option C and D.
We can then proceed to analyze the atomic mass of each element in an attempt to choose the option with a lower atomic mass than Potassium. Option A, Rubidium, has an atomic mass that is much higher than the 39 of potassium, which means we can discard option A. The correct choice is option B, Sodium , since it shares similar properties and has an atomic mass of 22.
To learn more:
https://brainly.com/question/1389981?referrer=searchResults
Related Questions
Which of the following synovial joints does not have a concave or convex articulating surface?
A. Condyloid joint
B. Pivot joint
C. Gliding joint
D. Hinge joint
Answers
Answer: C
Explanation:
Gliding joint (source: trust me bro)
Which is the best description of what is making the Earth warmer?
Answers
Which body system is responsible for rapidly communicating information inside the body using electrical impulses?
O Endocrine system
O Integumentary system
O Nervous system
O Skeletal system
Answers
Answer:
Your answer is (C) Nervous System!
Hope this helps!
Suppose a graduate student is studying a loss-of-function mutation in the mouse gene zigzag. whereas wild type mice have straight tails, zigzag mutant mice have tails with two sharp kinks, so that the tail looks like the letter z. to determine how the zigzag phenotype is inherited, he performs the crosses listed in the first colu
Answers
Complete question:
Suppose a graduate student is studying a loss-of-function mutation in the mouse gene zigzag. Whereas wild type mice have straight tails, zigzag mutant mice have tails with two sharp kinks, so that the tail looks like the letter Z. To determine how the zigzag phenotype is inherited, he performs the crosses listed in the first column of the table below, using parents from true-breeding lines. Three possible sets of results from these crosses are shown. Determine the mode of inheritance of the zigzag gene that would yield each result set.
Mode of inheritance Options:
cytoplasmic-linked recessive inheritance, maternal effect inheritance, genomic imprinting (paternal allele is inactive), genomic imprinting (maternal allele is inactive), x-linked recessive inheritanceNote: You will find the table in the attached file
Answer:
Set A: X-linked recessive inheritanceSet B: maternal effect inheritanceSet C: genomic imprint (paternal allele is inactive)Explanation:
SET A:
X-linked recessive inheritance: This pattern refers to a recessive mutated allele that expresses the abnormal character and is linked to the X chromosome.
Cross 1: zig zag female x wild type maleParental) Xz Xz x X+Y
F1) Phenotype---> 50% zigzag (all males) ; 50% wild type (all females)
Genotype---> ½ X+ Xz ; ½ Xz Y
Cross 2:Parental) X+ Xz x Xz Y
F1) Phenotype---> From the whole progeny: 25% wild type females ; 25% wild type males ; 25% zigzag females ; 25% zigzag males - 50% wild type animals + 50% zigzag animals
Genotype---> ¼ Xx Xz ; ¼ Xx Y ; ¼ Xz Xz ; ¼ Xz Y
Cross 3: wild type female x zigzag maleParental) X+ X+ x XzY
F1) Phenotype---> 100% wild type animals (50% females + 50% males)
Genotype ---> ½ X+ Xz ; ½ X+ Y
Cross 4:Parentals) X+ Xz x X+Y
F1) Phenotype---> From the whole progeny: 50% wild type females ; 25% wild type males ; 25% zigzag males
Genotype ---> ¼ X+ X+ ; ¼ X+ Xz ; ¼ X+ Y ; ¼ Xz Y
SET B:
Maternal effect: Refers to the influence of the “environment provided by the mother” on the progeny phenotype. The mother´s genotype directly determines the progeny phenotype. The progeny genotype is irrelevant, as well as the father´s genotype or phenotype. This means that no matter what is the genotype of the offspring, all of them will express the same phenotype as their mother. This effect is commonly seen in insects, but it might also occur in mammals and plants. A much known experiment about this effect is the one performed on Limnea sp snail.
Cross 1: zig zag female x wild type maleParental) Xz Xz x X+Y
F1) Phenotype-->100% zigzag animals, due to the female´s phenotype, Xz Xz
Genotype--> ½ X+ Xz ; ½ Xz Y
Cross 2:Parental) Xx Xz x Xz Y
F1) Phenotype-->100% wild type animals, due to the female´s phenotype, Xx Xz
Genotype--> ¼ Xx Xz ; ¼ Xx Y ; ¼ Xz Xz ; ¼ Xz Y
Cross 3: wild type female x zigzag maleParental) X+ X+ x XzY
F1) Phenotype-->100% wild type animals, due to the female´s phenotype, X+X+
Genotype --> ½ X+ Xz ; ½ X+ Y
Cross 4:Parentals) X+ Xz x X+Y
F1) Phenotype-->100% wild type animals, due to the female´s phenotype, X+ Xz
Genotype---> 100% wild type animals
SET C:
Genomic imprint (Paternal allele inactive): Refers to a pattern that characterizes for epigenetically inheritance and for unequally functional paternal and maternal genomes. Males X chromosomes are inactive or imprinted and have a different function from those females X chromosomes. This is a common pattern in some mammals, insects and angiosperms. The paternal allele can not be expressed which causes an unequal contribution to the progeny phenotype.
Cross 1: zig zag female x wild type maleParental) Xz Xz x X+Y
F1) Phenotype--->100% zigzag animals, because the male´s X chromosome is imprinted or inactive
Genotype--->½ X+ Xz ; ½ Xz Y
Cross 2:Parental) Xx Xz x Xz Y
F1) Phenotype--->50% wild type animals ; 50% zigzag animals. Due to both the female´s chromosomes, Xx Xz
Genotype---> ¼ Xx Xz ; ¼ Xx Y ; ¼ Xz Xz ; ¼ Xz Y
Cross 3: wild type female x zigzag maleParental) X+ X+ x XzY
F1) Phenotype--->100% wild type animals, due to the female´s phenotype, X+X+
Genotype ---> ½ X+ Xz ; ½ X+ Y
Cross 4:Parentals) X+ Xz x X+Y
F1) Phenotype--->50% wild type animals ; 50% zigzag animals
Genotype ---> ¼ X+ X+ ; X+ Y (Wild type)
¼ X+ Xz ; ¼ Xz Y ( zigzag)
If a woman has had a intercourse, and she missed a menstrual period by more than 14 days, she probably is pregnant. True or False
Answers
Answer:
true
Explanation:
Answer:
True.
Explanation:
Periods can come late, but even so, if the woman is an adult and has mostly predicable and a regular schedule that can be tracked, then the period could be late for at least 7-9 days MAX. 14 days would be pushing it.
how do obligate anaerobes, like the bacteria c. botulinum, get energy?
Answers
Answer:
It ferments.
Explanation:
This bacteria ferments glycine, proline, phenylaline, and leucine. The remaining energy is obtained by sugar metabolism.
Answer:
It gets energy by the process fermentation.
Select all of the things that an enzyme can do:
Answers
Answer:
que es enzima me lo explica :)
Explanation:
What does the measurement 45 N represent in the photograph?
Answers
Answer:
The magnitude(size) of a force
Explanation:
Apex
The measurement of 45 N represents the magnitude of force in the photograph.
What is force?Force is defined as a cause which is capable of changing the motion of an object. It causes an object which has mass to change it's velocity. It is also simply a push or a pull . It has both magnitude as well as a direction.Hence, it is a vector quantity.
It has SI units of Newton and is represented by'F'.Newton's second law states that force which acts on an object is equal to momentum which changes with time. If mass of object is constant, acceleration is directly proportional to net force acting on an object.
The concepts which related to force are thrust and torque .Thrust increases the velocity of an object while torque produces change in rotational speed of an object.
Learn more about force,here:
https://brainly.com/question/13191643
#SPJ7
Select the correct answer for the blanks.
What are the differences encountered in the photosynthetic-respiratory pathway of the carbon cycle, as it exists on land and in the ocean?
In a marine environment, the role of plants is performed by _______(phytoplankton, zooplankton, microorganisms) and an additional flux of carbon into the oceans is through _______(aeration, diffusion, deposition).
Answers
Answer:
phytoplankton; diffusion
Explanation:
"Phytoplankton" takes the role of the plant in the marine environment because it consists of tiny plants that contain chlorophyll–just like the terrestrial plants. This provides food to many aquatic animals in the ocean.
When it comes to carbon cycle, carbon dioxide from the atmosphere is being diffused into the ocean by dissolving it. The carbon in the ocean turns into an organic matter through the process of photosynthesis. The ocean is said to have more carbon compared to the atmosphere because many marine animals use it for survival.
Hail starts as liquid water and then is swept up and down in the clouds, building
many solid layers before it falls to Earth.
True
False
Answers
Answer:
It will be true.
Explanation:
N/A
Answer:
true
Explanation:
hail is a firm if solid precipitation.
CCC Predict: Suppose you randomly picked out two members of the
same phylum and two members of the same genus. Which pair of
organisms would you expect to have more characteristics in
common? Explain your answer.
ANSWER:
Answers
Answer:
genus
Explanation:
the closer something is to species, the more they have in common. and genus is closer to species than phylum
Answer: genus
Explanation: the more close something is to something else the better so in my opinion its genus
A star's mass determines the — galaxy it belongs to. shape of the star. length of it's lifecycle. location of the star.
Answers
Answer: Length Of Its Life Cycle
Explanation:
Which statement is an example of a scientific theory?
A.
All living organisms are composed of one or more cells, which came from pre-existing cells.
B.
Hummingbirds do not like the color white because they visit other colored flowers more often.
C.
The Earth is the third planet from the Sun and has one moon, which orbits the Earth.
D.
The amount that caffeine affects a person's heart rate differs based on the person's age.
Answers
Answer:
d
Explanation:
a theory is similar to a hypothesis except has backed up evidence already
Answer:
A
Explanation:
A is always true while the others are sometimes true, C is true in our galaxy, but not others. B is opinionated, different humming birds may like different colors. D is not considering other variables that could effect that situation, such as weight, height, blood pressure, etc. Therefore, A is correct.
Where do tidal bulges form during the New and Full moons?
Answers
Answer:
hope it helps..
Explanation:
High and low tides are caused by the Moon. The Moon's gravitational pull generates something called the tidal force. The tidal force causes Earth—and its water—to bulge out on the side closest to the Moon and the side farthest from the Moon. These bulges of water are high tides.
Why is it dangerous to have too much carbon dioxide in the atmosphere
Answers
Answer:
too much CO2 is toxic for humans to inhale. we rely on plants to absorb CO2 and produce O2. If they was a sudden extinction of all plants on earth, this would lead to a rise of CO2 which would reduce O2 air quality. (not good at all)
Explanation:
What gas is CREATED during cellular respiration?
Carbon Monoxide
O Carbon Dioxide
Water
Oxygen
Answers
Answer:
dioxide
Explanation:
Hey guys. So I need your help I have this rock presentation assignment worth 90 points and I have to find a good title. It’s about sample rocks granite sandstone and Phyllite. All from sedimentary igneous and metamorphic please help me find the right title! Thank you. (science)
Answers
Answer:
stone is stone , the most beautiful stone it is right I think
Which is observation proves that a cell is a eukaryote?
A.it has DNA in the cell
B.it has ribosomes inside the cell
C.it has enclosed organelles inside the cell
D.it is surrounded by a cell membrane
Answers
Need help pls I’m being timed
Answers
I believe the left chamber has a higher concentration of neon gas because it has more neon atoms in it, and the right chamber has a higher concentration of helium gas because it has more helium atoms in it.
You get 20 points
Plss help me it’s urgent
Answers
Answer: Somatic stem cells are capable of self-renewal, not differentiation
Embryonic stem cells are capable of self-renewal and differentiation
Amniotic fluid stem cells are capable of self-renewal and limited differentiation
Explanation:
Why do you think the top carnivores, that are tertiary consumers, cause there to be an increase thenumber of different types of species found in the ecosystems they live in?
Answers
Answer:
Bio Diversity
Explanation:
Top carnivores don't eat everything in the ecosystem which would let the uneaten species able to evolve and become new species (I don't know I'm just guessing sorry if this is wrong)
What is the source of energy for organisms that use chemosythesis?
Answers
Answer:
During chemosynthesis, bacteria living on the sea floor or within animals use energy stored in the chemical bonds of hydrogen sulfide and methane to make glucose from water and carbon dioxide (dissolved in sea water). Pure sulfur and sulfur compounds are produced as by-products.
Explanation:
What are TWO ways that species are becoming endangered due to human behaviors?
Answers
Losss of habitat and loss of genetic variation
Solutes and solvents must have similar chemical properties to form a solution.
true or false
Answers
Answer: I think it is true! Sorry of it is wrong :)
Is ATP used for long term storage?
Answers
Answer:
No
Explanation:
ATP is not used for long term storage.
Monosaccharides contain just one sugar unit, so they're the smallest of the carbohydrates. (The prefix "mono-" means "one.") The small size of monosaccharides gives them a special role in digestion and metabolism. In a process called cellular respiration, chemical energy in food is converted into chemical energy that the cell can use, and stores it in molecules of ATP. ... When the cell needs energy to do work, ATP loses its 3rd phosphate group, releasing energy stored in the bond that the cell can use to do work.
What is the difference between chromosome translocation and crossing over?
Answers
Answer:
translocation occurs between non-homologous chromosomes.
Explanation:
Dina should examine
and to find historical climate data for her hometown.
Answers
Answer:
what is the question
Explanation:
give a proper question and I would be happy to help
2Mg + O2 ----> 2MgO
in the equation above , how many atoms are in the oxygen molecule
A.2
B.0
C.1
D.3
Answers
Answer:
2
Explanation:
help.. ............. ....m
Answers
Answer:
All the flowers would be the same color. I am basing this under the assumption the capital Y means dominant in your homework. I think its 1:1:1:1 as a ratio
Explanation:
describe differences in water and oil. use the following terms in your description in the correct context : polar, nonpolar, hydrophilic, and hydrophobic