This questions has been a headaching me for a while. Please if anyone knows this answers?!

Answers

Answer 1

Answer:

Explanation:

1 represents the element, Hydrogen

It has 1 shell/electron

Because hydrogen has only the one electron/shell, it can also lose that electron/shell to form a completely empty n = 1 shell.

Related Questions

15. An electrically neutral atom consists of 15 neutrons, 13 electrons, and a number of protons. What is its mass number?

Answers

Answer:

Explanation:

it states that the atom is neutral, meaning the number of electrons and protons are the same. so if there are 13 electrons, there are 13 protons. And the mass number is neutrons plus protons. So 13+15 is 28

The charged subatomic particles in an atom are protons and electrons.

For an atom to be electrically neutral, the number of protons must be equal to the number of electrons to cancel out the charge exerted by the electrons.

Therefore, if the atom has 13 electrons, then the atom also has 13 protons. In other words, the atom has an atomic number of 13.

The mass number of an atom is the sum of the number if the atomic number or number of protons and the number of neutrons. Therefore, it’s mass number is 13+15=28.

Atoms of elements in the same group have the same number of . This is why they have similar chemical properties.

Answers

Answer:

Same number of electrons in their outer shell.

Explanation:

Whe working out their electronic configuration ( by looking at the atomic number) , one will find out that the number of electrons in their outer shell is also the same so the elements have to lose or gain the same amount of electrons to become stable.

Answer: its , valence electrons I just did it

Audrey drove 50 miles in 2 hours. What was her average speed? 25 miles per hour 20 miles per hour 50 miles per hour 100 miles per hour

Answers

If Audrey drove 50 miles in 2 hours her average speed would be 25 miles per hour.

Answer:

25 miles per hour is the answer.

Explanation:

It is right because I just finished the test and got 100%

An electron is approximately 0.05% of the mass of a proton. Protons and neutrons each have a mass of 1 amu. Which of the following best describes the relationship between mass and subatomic particles?
A. The mass of an electron is equal to that of a neutron
B. Atomic mass is the total number of protons and electrons
C. A neutron has 0.05% more mass than an electron
D. The nucleus comprises over 99% of the atom's mass

Answers

Answer:

D. The nucleus comprises over 99% of the atom's mass.

Explanation:

Which of the following best describes the relationship between mass and subatomic particles?

A. The mass of an electron is equal to that of a neutron. FALSE. The mass of an electron is ≈1/1,840 of that of a neutron.

B. Atomic mass is the total number of protons and electrons. FALSE. Atomic mass is the total number of protons and neutrons.

C. A neutron has 0.05% more mass than an electron. FALSE. A neutron has 0.05% more mass than a proton.

D. The nucleus comprises over 99% of the atom's mass. TRUE. The nucleus comprises protons and neutrons.

Complete the following calculation. Round off the answers to the correct
number of significant figures.
2.30 m x 3.65 m x 0.55 m
Plz help thank you!

Answers

Answer:

uhh can ya specify plezz

Explanation:

4.61725 is the answer just took a tiny quiz

Which of the following is not a possible effect of increasing carbon dioxide levels in the atmosphere?a.increase in water contamination and floodsb.ocean acidificationc.cutting down forestsd.reduction of cold-related deaths Please select the best answer from the choices providedABCD

Answers

Answer:

Explanation:

The only option that is not an effect of increasing carbon dioxide levels in the atmosphere is cutting down forests.

An increasing level of carbon dioxide in the atmosphere causes ocean acidification due to the dissolution of the gas in the oceans. Carbon dioxide also causes global warming - an increase in the average global temperature due to the heat (from the sun) absorbing ability of the gas.

Global warming causes an increase in the level of seas and oceans as a result of the melting of glaciers and polar ice caps. The rise in sea levels causes flooding with associated loss of habitats and biodiversity.

The increase in global temperature also means that cold-related deaths will reduce.

Correct option: b

Answer:

C. cutting down forests

Explanation:

edge test

WILL GIVE BRAINLETS

What is the landform in the image? A.Dune B.Hill C.Plateau D.River

Answers

Answer:

the answer is c

Explanation: bc it can't be a hill or a river and a dune no way so it is c a PLATEAU

hope this helped have a great day

C. Plateau
There is no water to be a river landform and no hills to be a hillbilly platform

A) accelerated upward. B) slowed and then stopped. C) moved at a constant velocity. D) increased its speed rapidly.

Answers

Answer:

A because the line is showing accelerated upward.

Explanation:

What role does DNA play in living organisms?

Answers

Answer: a nucleic acid that contains the genetic instructions for the development and function of living things

Explanation:

Which is the larger? 27 kilograms or 270 grams?

Answers

Answer: 27 killograms

Explanation: 1kg = 1000 grams

27 kilograms =27000 grams

2. Is it true thatOnly the stratosphere contains enough air for living things to breathe?

Answers

Answer:

I'm pretty sure that's false.

Explanation:

Choose all the answers that apply. What do all cells do? reproduce contain hereditary information have a nucleus break down food into energy have a cell membrane

Answers

Answer:

contain hereditary information

break down food into energy

Explanation:

Hereditary information is contained in genes and genes are found inside the cell. This implies that the cell contains hereditary information of organisms. This hereditary information is passed on during cell division from parent to daughter cells.

Metabolism occurs in the cells. The cells use oxygen to break down food materials to produce energy.

What are the four categories commonly used to classify chemicals and chemical agents in the graphic communications industry

Answers

Answer:

Organic

Plate making

Ink mists

Gas, fumes and dust

Explanation:

the four categories commonly used to classify chemicals and chemical agents in the graphic communications industry are Organic ,Plate making ,Ink mists, Gas, fumes and dust.

Organic refer to those chemicals gotten from living matter and are natural.

Plate making refers to how plates are make and it carry image in the printing process.

Ink mist gotten from ink is use in graphic designs for painting and color indication.

PLEASE HELP !!! Read the passage below and use it to answer the question. Rainforests have four basic layers. The tallest trees are part of the emergent layer, which can be as much as 60 m above the ground. The sunlight is bright and hot here, and the wind can be strong. The main layer of the rainforest is the canopy, more than 20 m above the ground. It is made up of the leaves and branches of tree tops. The air here is still and very moist. The canopy blocks out most of the sunlight. Smaller trees, vines, and other plants make up the understory, which is less than 12 m above the ground. This layer is damp and warm with very little sunlight. The forest floor is dark, warm, and moist. Decomposers break up fallen leaves and other dead matter here. Which of the following graphs best presents one of the abiotic factors of a rainforest?

Answers

Answer:

Read the back of glossary

Explanation:

Read pages

Answer:

hi A

Explanation:

i need the points please

To practice for an Ironman competition, John rode his bike for 15 kilometers. How many
meters did he ride?

Answers

Answer:

15000

Explanation:

1000 Meters in a kilo meter. So multiply 15 by a 1000.

matter that has a uniform and defined composition is called a

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Answer - A substance is matter that has a uniform and definite composition. All samples of substances, sometimes called pure substances, have identical properties.

When the internal energy of a material increases,: a) its temperature will rise b) it will go through a phase change c) A and B d) A or B

Answers

Answer:

a or b

Explanation:

Answer:

D. A or B

Explanation: The temperature of a substance cannot increase during phase change, so both A and B cannot happen simultaneously. And internal energy is the sum of the microscopic potential and kinetic energies of a substance, which increase with temperature and phase transition.

The answer choices are
-solid
-liquid
-gas

Answers

Answer:

solid, gas

Explanation:

gasses are very low density because there is a low mass in a large volume with lots of space between atoms, solids on the other hand are very densely packed and there is very little room between atoms

solid and gas just took the quiz:)

Which statement refers to the quantum mechanical model? A) Electrons move in a circular path about the nucleus. B) Electrons can lose energy and fall into the nucleus. C) Electrons are in "orbitals", regions of space where there is high probability of being found. D) An electron can move from one circular path to another only when it absorbs or emits energy corresponding to the exact difference between the two energy states.

Answers

Answer:

Electrons are in "orbitals", regions of space where there is high probability of being found.

Explanation:

The Wave mechanical model of the atom does not restrict the electrons to certain energy levels only as in the Bohr's model, instead it describes a region around the nucleus called an orbital, where there is a high probability of finding an electron with a certain amount of energy.

Each energy level is composed of one or more orbitals and the distribution of electrons around the nucleus is determined by the number and kind of energy levels that are occupied.

Isaac Newton believed that light was made of
O waves.
O particles.
O dust.
O gravity.

Answers

Explanation:

particles

Answer: particle

Explanation:

The light make small particle of wave

Calculate 1.23 m x 0.89 m and give your answer with the correct number of significant figures?

Answers

Answer:

1.1m that what I got and it said it was right

The calculation of the given figure to one significant figure is[tex]1.1 m^{2}[/tex]

Significant figures can be regarded as a number of digits that is present in a particular value.Given 1.23 m

And 0.89 m

If we multiply we have

[tex]( 1.23*0.89) = 1.0947[/tex]

Since, there is no definite significant figure given, I will assume one significant figure.

To do this we start to count significant figures starting from first non-zero digit to the actual figure we are requested to stop.

We can see that 9 is after zero, the we round off that 9 then it will become 1 , Then the value to one significant figure is [tex]1.1m^{2}[/tex]

Therefore, the multiplication of the values to one significant figure is [tex]1.1^{2}[/tex]

Learn more at:https://brainly.com/question/13386983?referrer=searchResults

Find the molar mass of (NH4)2Cr2O7.

Answers

Answer: The molar mass of ammonium dichromate is 252.06 g/mol

Hope this helped :)

Calculate the following to the correct number of significant figures 0.0041 cm x 2.00 cm
x 501 cm

Answers

Answer:

4.1 cm³

Explanation:

When multiplying, the product must have the same number of significant figures as the factor with the least number of significant figures. 0.0041 has two significant figures, 2.00 has three significant figures, and 501 has three significant figures. The answer will have 2 significant figures.

0.0041 cm × 2.00 cm × 501 cm

= 4.1082 cm³

≈ 4.1 cm³

2. How have fossils been preserved over millions of years?

Answers

Answer:A fossil is the remains or traces of a once-living plant or animal that was preserved in rock or other material before the beginning of recorded history. ... Fossils of single-celled organisms have been recovered from rocks as old as 3.5 billion years. Animal fossils first appear in rocks dating back about 1 billion years.

Explanation:

Five

Five types of fossils: (a) insect preserved in amber, (b) petrified wood (permineralization), (c) cast and mold of a clam shell, (d) pyritized ammonite, and (e) compression fossil of a fern.

Does more data mean more reliable results or less

Answers

Answer:

more reliable. The more results the better results you get.

Explanation:

Answer:

more reliable results

Explanation:

hey there,

< More data is more reliable results as you can see even more about the experiment you are doing! If you only know one other scientist that had done the experiment and it worked for him, then that's not enough data, but if you have thousands of scientists that were able to do the experiment correctly, you will have a more reliable and correct result since now you have more data. >

Hope this helped! Feel free to ask anything else.

What is the significance of being able to "grow" organs?

Answers

Answer:

The significance of being able to "grow" organs is the potential to create new organs to replace the old and worn out ones or any that are missing. This can potentially save lives.

Explanation:

Which of the following statements is true? A)If a hypothesis is proven false, a mistake has been made in the experiment.B) The independent variable is what changes as a result of the dependent variable. C) Changes in the independent variable cause changes in the dependent variable. D) Once a hypothesis is proven true, it becomes a theory and cannot be disproved. ANSWER ASAP

Answers

Answer:

Explanation:

once a hypothesis is proven true, it becomes a theory and cannot be disproved.

Im so glad i got help with this one because i got a hundred bc of someone.

How do we observe in experiments?

Answers

Answer:

by watching and writing down the information that is provided

Explanation:

A 42.0g sample of compound containing only C and H was analyzed. The results showed that the sample contained 36.0g of C and 6.0g of H.
Which of the following questions about the compound can be answered using the results of the analysis? (choose 1 option)
A) What was the volume of the sample?
B) What is the molar mass of the compound?
C) What is the chemical stability of the compound?
D) What is the empirical formula of the compound?

Answers

Answer:

D) what is the empirical.formular of the compond

Explanation:

this is because we have two elements and to calculate the empiral formula we need to have their masses which is also given

carry out this problem 2.4g/mlx15.82ml

Answers

Answer:

Explanation:

i dont really know

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