Answers
Answer:
2, 3, 4, 5
Explanation:
Pretty sure protons matter a lot unless in acid and bases but ignore this. Atoms mostly empty space as electrons are reeeeeeeeeeaaaallllllyyyy far apart. number of electrons change it is an ion and neutrons change pretty sure its an isotope. Electrons are stupidly small and fast so they don't really count towards the weight. Most mas comes from neutrons and protons in the nucleus
Answer:
2,3,4,5
1st is wrong cuz if u change the number of proton it would change the atomic number which results in different element
6th is wrong because most mass of the atoms come from neutrons and protons collectively so if it would have said THE ATOMS MASS MOSLTY COMES FROM NUCLEONS then u could mark it right
Related Questions
the advantage of asexual reproduction is.
a. There are no genetic mutations
b. reproduction doesn't require a mate
c. increase genetic variation
Answers
Answer:
1.) Genetic Variation, 2.) reproduction doesn't require a mate.
Explanation:
These are the only two that actually make sense in the blanks, So trust me or trust the other two answers.Your choice.
6. What is one way a star with much more mass than the sun can end up?
white dwarf
red giant
neutron star
red dwarf
Answers
Answer:
neutron star
Explanation:
A massive star (More massive than the star) will undergo a supernova explosion. If the remnant of the explosion is 1.4 to about 3 times as massive as our Sun, it will become a neutron star. The core of a massive star that has more than roughly 3 times the mass of our Sun after the explosion will do something quite different
What is the total number of protons, electrons, and neutrons found in one atom of
iron, Fe, with a mass number of 56?
Answers
Answer:
The most common atom of iron has 26 protons and 30 neutrons in its nucleus
Select all the correct answers.
Regina is testing this hypothesis:
Higher relative humidity leads to faster growth in orchids.
She has designed an experiment in which she will grow orchids in terrariums of varying humidity levels. She will then observe how the humidity affects the growth of the plants.
Which of the following variables are the confounding variables that Regina should control for before beginning her experiment?
1.the amount of sunlight the plants receive
2.the temperature at which the plants grow
3.the type of soil in which the plants grow
4.the growth rate of each of the plants
5.the relative humidity inside each terrarium
Answers
Answer:1,2,&3
Explanation:
four and five would not qualify as confounding variable‘s
2) A student was working on an investigation to measure the relative activity
of an enzyme at various pH values. He collected the following data:
pH 2, enzyme activity 10; pH 8, enzyme activity 50;
pH 12, enzyme activity 10; pH 4, enzyme activity 20;
pH 6, enzyme activity 40; pH 10, enzyme activity 40
Answers
Answer:
THE LAST ONE
Explanation:
What measuring tool is used to find the volume of a shoe box?
A.water displacement
B.scale
C.beaker
D.ruler
Answers
Answer:
D. Ruler
Explanation:
Use the formula to find the volume of a cuboid by measuring the length, width, and height and multiplying all of them by each other.
The number of electrons in the first three energy levels for four neutral elements is shown in the table. The element with the highest ionization energy is-
Answers
Answer:
The correct option is;
Element 2
Explanation:
The ionization energy is the energy required to eject an electron from a gaseous ion or atom
The ionization energy increases across the period and increases up the group
The elements with the highest ionization energy are those that have the complete octet structure in their outermost shell, which are the noble gases
Therefore, given that element 2, which has the complete octet structure in the outermost shell, then it is an element of the noble gases which have the highest ionization energy in a period, and therefore has the highest ionization energy.
On the periodic table, the element with 10 electrons is Neon, with ionization energy of 2080.68 kJ/mol which is the second highest after helium, that has only 2 electrons.
pure sodium and chlorine are extremely dangerous, but when combined the result in substance that we use every day. How do you think the properties of sodium and chlorine change when they are combined to make sodium chloride?
Answers
Answer:
Explanation:
chlorine has 7 valence electrons while sodium has 1. on their own, they are very reactive elements. a full valence electron shell has 8 electrons, so when elements combine and have 8 electrons in their outer shell, they are not reactive. when sodium and chlorine are combined to form sodium chloride (table salt), it is no longer dangerous. the number of valence electrons changes its reactivity and how it combines.
The properties of sodium and chlorine change when they are combined to make sodium chloride should be explained below.
Information regarding chlorine:chlorine comprises of 7 valence electrons while on other hand, sodium has 1. A full valence electron shell contains the 8 electrons, so when elements combine and have 8 electrons in their outer shell, they are not reactive.
learn more about substance here: https://brainly.com/question/19287431
In which of the following physical states are the particles in constant motion?
1. Solid
II. Liquid
III. Gas (Vapor)
I and Ill only
O I. II and III
Oil and ill only
Ill only
Answers
Answer:
cgeh
Explanation:salamat
what is the electron configuration for gallium
Answers
Answer:
[Ar] 3d^104s^24p^1
Are the oldest rocks in the canyon found near the bottom
Answers
Answer: yes they are
Explanation:
because its so hot and the heat just stays at the bottom
The relative formula mass (M) of a Group 2 metal carbonate is 197
Relative atomic masses (Ar): C = 12
O = 16
Calculate the relative atomic mass (Ar) of the Group 2 metal in the metal carbonate
Name the Group 2 metal.
Answers
The relative atomic mass (Ar) : 137 and the element : Ba
Further explanationThe naming of chemical compounds is giving a special name to a compound that aims to facilitate the classification of compounds and facilitate the identification of a compound. The rules for naming chemical compounds have been determined by the IUPAC (International Union of Pure and Applied Chemistry)
This nomenclature includes the naming of ion compounds, covalent compounds, and polyatomic
The molar mass of a compound is given by the sum of the relative atomic mass of Ar
M AxBy = (x.Ar A + y. Ar B)
Group 2 metals have a +2 charge : M²⁺
So the compound of metal carbonate : MCO₃
Ar C = 12, O = 16
M MCO₃ = (1.Ar M + 1. Ar C+ 3. Ar O)
[tex]\tt 197=1. Ar~M+1.12+3.16\\\\197=Ar~M+12+48\\\\Ar~M=137[/tex]
The element with relative atomic masses 137 is Ba
So the compound : BaCO₃
The distinctive odor of vinegar is due to acetic acid, HC₂H₃O₂, which reacts with sodium hydroxide. If a 3.45 mL sample of vinegar needs 42.5 mL of 0.115 M NaOH to be neutralized, how many grams of acetic acid are in a 1.00 L bottle of this vinegar?
Answers
Answer:
Explanation:
CH₃COOH + NaOH = CH₃COONa + H₂O .
42.5 mL of .115 M of NaOH will contain .0425 x .115 moles of NaOH
= 48.875 x 10⁻⁴ moles NaOH
It will react with same number of moles of acetic acid
So number of moles of acetic acid in 3.45 mL = 48.875 x 10⁻⁴
number of moles of acetic acid in 1000 mL = 48.875 x 10⁻⁴ x 10³ / 3.45 moles
= 1.4167 moles
= 1.4167 x 60 gram
= 85 grams .
So 85 grams of acetic acid will be contained in one litre of acetic acid.
how many grams of oxygen gas are produced when this sample is heated?
Answers
Answer: 2.92%
Explanation:
what best explains the cause of strong winds on a island?
Answers
PLEASE explain your answer!!!!
Answers
Answer:
Explanation: confusing
please help timed !! due today rn!!what does thermal equilibrium mean
Answers
Examine the layers of rock. Identify and explain which layer contains the youngest fossils.
Earth layers with fossiles in each labeled top to bottom A to D.
Answers
Answer:
Layer A is the youngest
Explanation:
It is at the top, it has all of the dinosaur bones which got buried after earth got hit with an asteroid and they went extinct. Layer D started it and all of these years dirt, soil, and fossils have been gathering making each layer before older and older.
How many days will pass between a new moon and a full moon?
Answers
Answer:
30
Explanation:
im smart
Answer:
The longest duration between full moon to new moon (or new moon to full moon) lasts about 15 days and 14.5 hours, while the shortest duration between full moon to new moon (or new moon to full moon) lasts only about 13 days and 22.5 hours. New Moon appears higher on summer solstice than on winter solstice.
Explain what a cold front is.
Answers
Answer:
A cold front is a boundary or zone that separates two air masses. The cooler more dense mass replaces the warmer.
hope this helps :)
Explanation:
Answer:
A cold front is a boundary or zone that separates two air masses. The cooler more dense mass replaces the warmer.
Explanation:
i am smart.....( i think )
Which particle changes to create a new element?
A.proton
B.neutron
C.electron
Answers
Answer: A
Explanation:
6. How is energy transferred to the earth?I
Answers
Answer:
Energy is transferred between the earths surface and atmosphere.Energy move place to place
I need help what is the Find the value of x
Answers
Answer:
45 degrees
Explanation:
as you can see, the box in the corner states that both the angles together are 90 degrees, and half of that is 45. 90/2=45
A snicker bar has 300. Kcal, how many Joules of energy does it contain?
Answers
Answer:
1255200J
Explanation:
1 cal = 4.184 J
1kcal = 4184 J
thus, 300 kcal= 4184 × 300
= 1255200J
= 1255.2 kJ
= 1.2552 MJ
C12H7Cl3FNaO2 what are them elements in that chemical formula
Answers
carbon
hydrogen
chlorine
fluorine
sodium
oxygen
How does a cold trap catch pollutants in smog?
Answers
Answer:
A temperature inversion occurs when air near the ground is relatively cool, and there is a layer of warmer air above it. That upper layer of warm air keeps the cooler air from rising, and traps all of the pollution in the cooler, lower layer.
Explanation:
Hope this helps
Crown me as brainliest:)
what do you think would be a good science fair project for an 8th grade advanced class?
Answers
Answer:
maybe something about planets or the solar system and they have to make them
Explanation:
Answer:
create a rainbow of flames or build an infinty mirror
Explanation:
Two or more atoms that have been chemically combined are
called a
Answers
Answer:
compound
Explanation:
Nuclear energy is currently used in which three kinds of vehicles?
Answers
Answer:
A. cars, submarines, spacecraft
Explanation:
I took the test.
How many atoms are present in 48.60 g ofMg
Answers
Answer: Explanation:
There are 6.02 x 10^23 atoms in 1 mol.