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AlladinOne [14]
1 year ago
15

Using the periodic table, complete the table to describe each atom.

Chemistry
1 answer:
OLga [1]1 year ago
4 0

The elements are the arranged in the periodic table in order of increasing atomic number.

<h3>What are the elements?</h3>

The elements are the arranged in the periodic table in order of increasing atomic number. We know that the atomic number refers to the number of protons in the atom. The sum of the number o protons and the number of neutrons in the atom gives the mass number of the atom.

In the case of the first element, there are 7 neutrons and the mass number is 15. Thus the number of protons = 15 - 7 = 8. The element that has atomic number 8 is oxygen (O).

In the second case, the atomic number is 26 is iron. Given that the mass number is 56, there are 30 neutrons and the element symbol is Fe.

Learn more about the periodic table:brainly.com/question/11155928

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Answer:

The conversion of liquid water into gaseous water is a chemical change

Explanation:

A chemical change occurs when there is a chemical reaction, so there'll be changed in the compounds, such as forming new ones, forming its elements, or elements forming compounds.

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So the evaporation of water, or its conversion in gaseous water, is a physical change, not a chemical change.

6 0
3 years ago
GIVING BRAINLIEST FOR RIGHT ANSWERS PLS HELP
Anuta_ua [19.1K]

Answer:

Answer: Chemical change; Chemical property of heat of combustion

Explanation:

A physical change is defined as a change in which there is alteration in shape, size etc. No new substance gets formed in these reactions.

Explanation:

4 0
3 years ago
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What is the equilibrium equation for the dissociation of formic acid in water? hcooh (aq) + h2o (l) ⇌ h3o+ (aq) + hcoo- (aq)?
Pani-rosa [81]
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<span>HCOOH (aq) + H2O (l) ⇌ H+ (aq) + HCOO- (aq)

Formic acid is a weak acid which means that when in aqueous solution it does not completely dissociate into its corresponding ions. Only a certain amount that would be dissociated so in the solution there will be HCOOH, HCOO- and H+ molecules. It is also known as Methanoic acid and an important substance for the synthesis of a number of substances. It is naturally occurring in ants.</span>
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3 years ago
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For the reaction 2Fe + 3Cl2 → 2FeCl3 which of the following options gives the correct reactant:reactant ratio? Fe:Cl2 = 1:1 Fe:C
BigorU [14]

Answer: Fe:Cl2 = 2:3

Explanation:

8 0
3 years ago
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