What is the periodic table?

Answers

Answer 1

Answer:

 A Chart Of The Chemical Elements That Displays Them In Rows Horizontally In Order Of Increasing Atomic Number And Vertically According To Similarity Of The Chemical Properties Of Their Atoms.


Related Questions

In which step of meiosis do chromosomes first condense?

telophase I
telophase II
prophase I
prophase II

Answers

I think the answer is telophase lol

Answer:

Someone Said Telophase II. Ill update if its right or wrong when I finish.

Update : He is.... Wong. False.

Explanation:

The answer is Prophase I. It is not Telophase II.

How large are dwarf galaxies compared to the Milky Way galaxy?

Question 1 options:

the same size


about 1/5 the size


about 1/10 the size


billions of time smaller

Answers

Billions of time smaller

Please help me with this :) thank you

Answers

Answer:

your welcome :)

Explanation:

An atom's mass number equals the number of

Answers

Answer:

Together, the number of protons and the number of neutrons determine an element's mass number: mass number = protons + neutrons. If you want to calculate how many neutrons an atom has, you can simply subtract the number of protons, or atomic number, from the mass number.

Explanation:

hiiiii

hope u Likes it

Viết cấu trúc Lewis và công thức cấu tạo cho các phân tử sau: MgO; HNO3; H2SO4. Giải thích liên kết trong các phân tử trên thuộc loại liên kết gì? Xác định mức độ ion trong liên kết MgO.

Answers

Answer:

hydrogen cloride

Explanation:

A skateboarder is shown below.
At which point is the skateboarder's potential energy the greatest?

A. W
B. X
C. Y
D. Z

Answers

Answer:

W I think good luck I think

Answer: w

Explanation: potential energy is greater when higher from the ground. i took the test

In this experiment, between 1.900-2.100 g of a mixture containing the reactants zinc sulfate and sodium phosphate was added to acidified water to undergo a double displacement (precipitation) reaction. This mixture had an unknown percent composition of reactants. To make matters more complicated, the unknown mixture did NOT contain stoichiometric quantities of the reactants.

1. (1 point) Write a molecular equation for the reaction of aqueous zinc sulfate and aqueous sodium phosphate.

Answers

Hope this helps. Thanks.

Solid carbon and oxygen gas combine to form carbon dioxide gas .

Answers

Answer:

C(s) + O2(g) --> CO2(g)

Explanation:

Answer:

True

Explanation:

Solid carbon and oxygen gas when mixed together reacts, and forms carbon dioxide gas.

What are some medical uses of radiation?

Answers

Answer:

Radiation therapy

Explanation:

I hope this helps

For the hypothetical compound AX3, which statement is true?
Answer is B.
A I’d a metal from a group 3A and X is a nonmetal from group 7A

Answers

Answer:

i

b because it says it in the question

Liquids _____.

a. take the shape of the container and
b. have a definite volume
c. have definite shape and a definite volume have no shape and no definite volume
d. none of the above

Answers

Answer:

It takes the shape of a container.

Suggest the stable ion for phosphorus and why?

Answers

Phosphorous has 5 valence electrons and so gaining 3 electrons will make it isoelectronic with the stable noble gas argon, and will produce the P3- ion

calculate the gravimetric factor of Fe in Fe2O3​

Answers

i hope this calculation will help you  

If you place rice on top or a speaker, what will happen to the rice when you turn the speaker on?

The rice will begin to move.

The rice will do nothing

Answers

Answer:

The rice will move

Explanation:

the sound vibration and waves will cause the rice to move

Answer:

The rice will begin to move.

Explanation:

Please help me with this question it’s really confusing lol. Question 15

Answers

Answer:

i think it might be a giant astroid came and killed everything  sorry if im wrong

Explanation:

Identify the element by its symbol and name after looking at the element model pictured below.

Symbol:
Name:

Answers

Symbol: O

Name: Oxygen

as number of protons + number of neutrons = atomic mass

8+8=16

The element is Oxygen (O) in the given element model.

The atomic number of an element is equal to the number of protons in its nucleus. Since the element in question has 8 protons, its atomic number is 8. Oxygen has an atomic number of 8, making it the element with 8 protons. Additionally, the atomic number determines the identity of an element; no other element has 8 protons in its nucleus.

The element's name is Oxygen, and its chemical symbol is O. Oxygen is a vital element in the Earth's atmosphere and is essential for supporting life. It is commonly found in the form of diatomic molecules (O2), which make up a significant portion of the air we breathe. Oxygen plays a crucial role in various biochemical and chemical processes, and its presence is essential for the respiration of most living organisms.

To learn more about Oxygen, here

https://brainly.com/question/34199483

#SPJ3

Have a tour in your kitchen pick five (5) food products having nutrition facts
and ingredients. Look for the name of elements and compounds that are present.
Complete the table below with necessary details from the food labels of the food
product you have picked. Write your answer in a separate sheet of paper.

Answers

Answer:

strawberry blueberry raspberry walang compound at element

PLS HELP I WILL GIVE BRAINLIEST

Answers

Answer:

The answer has to be A, greater force of attraction than the gas, only

Explanation:

I really hope this helps! Have a good day and good luck!

please help , science tho. by the way i have to do 5

Answers

Answer:

850

Explanation:

It's between 840 and 860

If the reaction occurs between Fe2S3(s) and H+ (aq) and the equation is properly balanced with the smallest
whole-number coefficients, what is the sum of the coefficients for all reactants and products?
Fe2S3(s) + H+ (aq)

Answers

The sum of the coefficients for all reactants and products is: 12.

Here, we first need to balance the equation of the reaction between Fe2S3(s) and H+.

The chemical equation yields H2S and Fe3+ as follows;

Fe2S3(s) + H+ (aq) ------> H2S + Fe3+(aq)

Balancing the equation consequently yields;

Fe2S3(s) + 6H+ (aq) ------> 3H2S + 2Fe3+(aq)

The sum of the coefficients for all reactants and products is therefore;

Sum = 1 + 6 + 3 + 2.

Sum of coefficients = 12

Read more:

https://brainly.com/question/16887565

How many grams of sodium are contained in 4moles of na2co3

Answers

Answer:

424 grams of sodium are contained in 4moles of na2co3

how many millilters of a 6.00 M sulfuric acid solution are reqired if you need 0.750 moles of H2SO4 for a reaction

Answers

125 milliliters of a 6.00 M sulfuric acid solution are required if 0.750 moles of H2SO4 are needed for a reaction.

HOW TO CALCULATE VOLUME:

The volume of a solution can be calculated by dividing the number of moles of that solution by its molar concentration. That is:

Volume = no. of moles ÷ molarity

According to this question, the molarity is given as 6.00 M sulfuric acid solution and the no. of moles is 0.75 moles. The volume is calculated thus:

Volume = 0.75mol ÷ 6M

Volume = 0.125L

Volume of sulfuric acid in milliliters = 0.125 × 1000 = 125mL

Therefore, 125 milliliters of a 6.00 M sulfuric acid solution are required if 0.750 moles of H2SO4 are needed for a reaction.

Learn more at: https://brainly.com/question/2817451?referrer=searchResults

calculate the number of molecules of hydrogen and carbon present in 4g of methane

Answers

[tex]\underline{\boxed{\bf 15.05\times 10^{22} molecules\: of\: Carbon}}[/tex]

[tex]\underline{\boxed{\bf 6.023\times 10^{23} molecules\:of\: Hydrogen}}[/tex]

Refer to the attachment for calculations

can you solve these?

Answers

Answer:

yes

Explanation:

it's easy

Hello! Hope it helps!

David drops a golf ball and a bowling ball at the same time. He then drops a tennis ball and a volleyball. He notices that each pair hit the ground at the same time. Then David picks up a marble and a baseball. If he drops them both at the same time, what can David predict will happen

Answers

Answer:

if he drops them some where there is no air they will both land at the same time as they have no air resistance and gravity pulls every item equally but if they just do it of a building in the middle of the street then the baseball would hit first as it has a larger mass  

Explanation:

A 10.0 cm sample of copper has a mass of 89.6 g. What is the density?

Answers

Answer:

19.3 g/cm3

A 10.0 cm3 sample of copper has a mass of 89.6 g. What is the density of copper? 19.3 g/cm3

Which two seasons are best for growing plants due to the amount of sun received at those times? (Select two.)
winter
summer
autumn
spring

Answers

Answer:

spring and summer

Explanation:

Answer:

summer and spring

Explanation:

The pressure of gas in a 600.0 mL cylinder is 65.0 mmHg. What is the new volume when the pressure is increased to 385 mmHg?

Answers

Answer:

P1V1=P2V2

65 mmHg × 600 mL = 385 mmHg × V2

V2 = 101.30 mL

Explanation:

We can use Boyle's law

An excess of sodium carbonate, Na, CO3, in solution is added to a solution containing 17.87 g CaCl2. After performing the
experiment, 13.19 g of calcium carbonate, CaCO3, is produced. Calculate the percent yield of this reaction.

Answers

Answer:

Approximately [tex]81.84\%[/tex].

Explanation:

Balanced equation for this reaction:

[tex]{\rm Na_{2}CO_{3}}\, (aq) + {\rm CaCl_{2}} \, (aq) \to 2\; {\rm NaCl}\, (aq) + {\rm CaCO_{3}}\, (s)[/tex].

Look up the relative atomic mass of elements in the limiting reactant, [tex]\rm CaCl_{2}[/tex], as well as those in the product of interest, [tex]\rm CaCO_{3}[/tex]:

[tex]\rm Ca[/tex]: [tex]40.078[/tex].[tex]\rm Cl[/tex]: [tex]35.45[/tex].[tex]\rm C[/tex]: [tex]12.011[/tex].[tex]\rm O[/tex]: [tex]15.999[/tex].

Calculate the formula mass for both the limiting reactant and the product of interest:

[tex]\begin{aligned}& M({\rm CaCl_{2}}) \\ &= (40.078 + 2 \times 35.45)\; {\rm g \cdot mol^{-1}} \\ &= 110.978\; \rm g \cdot mol^{-1}\end{aligned}[/tex].

[tex]\begin{aligned}& M({\rm CaCO_{3}}) \\ &= (40.078 + 12.011 + 3 \times 15.999)\; {\rm g \cdot mol^{-1}} \\ &= 100.086\; \rm g \cdot mol^{-1}\end{aligned}[/tex].

Calculate the quantity of the limiting reactant ([tex]\rm CaCl_{2}[/tex]) available to this reaction:

[tex]\begin{aligned}n({\rm CaCl_{2}) &= \frac{m({\rm {CaCl_{2}})}}{M({\rm CaCl_{2}})} \\ &= \frac{17.87\; \rm g}{110.978\; \rm g \cdot mol^{-1}} \\ &\approx 0.161023\; \rm mol \end{aligned}[/tex].

Refer to the balanced equation for this reaction. The coefficients of the limiting reactant ([tex]\rm CaCl_{2}[/tex]) and the product ([tex]{\rm CaCO_{3}}[/tex]) are both [tex]1[/tex]. Thus:

[tex]\displaystyle \frac{n({\rm CaCO_{3}})}{n({\rm CaCl_{2}})} = 1[/tex].

In other words, for every [tex]1\; \rm mol[/tex] of [tex]\rm CaCl_{2}[/tex] formula units that are consumed, [tex]1\; \rm mol\![/tex] of [tex]\rm CaCO_{3}[/tex] formula units would (in theory) be produced. Thus, calculate the theoretical yield of [tex]\rm CaCO_{3}\![/tex] in this experiment:

[tex]\begin{aligned} & n(\text{${\rm CaCO_{3}}$, theoretical}) \\ =\; & n({\rm CaCl_{2}}) \cdot \frac{n({\rm CaCO_{3}})}{n({\rm CaCl_{2}})} \\ \approx \; & 0.161023\; {\rm mol} \times 1 \\ =\; & 0.161023\; \rm mol\end{aligned}[/tex].

Calculate the theoretical yield of this experiment in terms of the mass of [tex]\rm CaCO_{3}[/tex] expected to be produced:

[tex]\begin{aligned} & m(\text{${\rm CaCO_{3}}$, theoretical}) \\ = \; & n(\text{${\rm CaCO_{3}}$, theoretical}) \cdot M(({\rm CaCO_{3}}) \\ \approx \; & 0.161023\; {\rm mol} \times 100.086\; {\rm g \cdot mol^{-1}} \\ \approx \; & 16.1161\; \rm g \end{aligned}[/tex].

Given that the actual yield in this question (in terms of the mass of [tex]\rm CaCO_{3}[/tex]) is [tex]13.19\; \rm g[/tex], calculate the percentage yield of this experiment:

[tex]\begin{aligned} & \text{percentage yield} \\ =\; & \frac{\text{actual yield}}{\text{theoretical yield}} \times 100\% \\ \approx \; & \frac{13.19\; {\rm g}}{16.1161\; {\rm g}} \times 100\% \\ \approx \; & 81.84\%\end{aligned}[/tex].

Please help me with this question it’s really confusing lol.

Answers

Answer:

should be earthquake

Explanation:

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