# Grade 7 Periodic Table Quiz

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Do you think you know everything about the periodic table and its elements? You can take this grade 7 periodic table quiz to see how well you remember the periodic table. Here, in this quiz, you will get a chance to test your memory and recall everything related to the grade 7 periodic table. Go for it and prove to yourself that you still remember everything. All the best! You can also share the quiz with others to challenge them on the periodic table.

• 1.

### What does the atomic mass tell?

• A.

The number of neutrons

• B.

The number of electrons and protons

• C.

The number of protons

• D.

The number of protons and neutrons

D. The number of protons and neutrons
Explanation
The atomic mass tells us the combined mass of both protons and neutrons in an atom. It does not include the mass of electrons, as they have a negligible mass compared to protons and neutrons. Therefore, the correct answer is "The number of protons and neutrons."

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• 2.

### What does an atom of the element with atomic number 6 always have?

• A.

An atomic mass of 6

• B.

6 protons in its nucleus

• C.

More than 6 neutrons

• D.

6 electron clouds

B. 6 protons in its nucleus
Explanation
An atom of the element with atomic number 6 always has 6 protons in its nucleus. The atomic number of an element represents the number of protons in its nucleus, and since the question specifically mentions the element with atomic number 6, it indicates that it is referring to carbon (C). Therefore, every carbon atom will have 6 protons in its nucleus.

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• 3.

### A chemical symbol represents elements. The symbols are written with

• A.

At least and only one capital letter.

• B.

All capital letters

• C.

All lower case letters

• D.

Always only one letter

A. At least and only one capital letter.
Explanation
The correct answer is "At least and only one capital letter." This is because chemical symbols for elements are typically written using one capital letter, such as "H" for hydrogen or "O" for oxygen. While some symbols may consist of two letters, the first letter is always capitalized and the second letter is lowercase, such as "Na" for sodium or "He" for helium. Therefore, the statement "At least and only one capital letter" accurately describes the convention for writing chemical symbols.

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• 4.

### How many electrons does carbon have?

• A.

6.011

• B.

12.001

• C.

12

• D.

6

D. 6
Explanation
Carbon has 6 electrons. This is because the atomic number of carbon is 6, which indicates the number of protons in its nucleus. In a neutral atom, the number of electrons is equal to the number of protons. Therefore, carbon has 6 electrons.

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• 5.

### How many maximum electrons does the innermost energy level have?

• A.

1

• B.

2

• C.

3

• D.

4

B. 2
Explanation
The innermost energy level, also known as the first shell or K-shell, can hold a maximum of 2 electrons. This is because the first shell has only one sublevel, which is the s sublevel, and the s sublevel can accommodate a maximum of 2 electrons.

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• 6.

### Which is not a compound?

• A.

NaCl

• B.

HCl

• C.

Cl

• D.

CO2

C. Cl
Explanation
The compound is a substance composed of two or more elements chemically bonded together. NaCl (sodium chloride), HCl (hydrochloric acid), and CO2 (carbon dioxide) are all compounds because they consist of different elements bonded together. Cl, on the other hand, is not a compound because it represents a single element, chlorine, which is not chemically combined with any other element.

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• 7.

### Salt has a chemical formula of NaCl. It is a

• A.

Mixture

• B.

Compound

• C.

Element

• D.

Atom

B. Compound
Explanation
Salt has a chemical formula of NaCl, which indicates that it is composed of two elements: sodium (Na) and chlorine (Cl). A compound is a substance made up of two or more different elements chemically combined in a fixed ratio. Since salt is made up of sodium and chlorine in a fixed ratio of 1:1, it is considered a compound.

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• 8.

### Which of the following properties are characteristic of the Group 1 metals?

• A.

Low reactivity and the formation of stable compounds

• B.

High reactivity and the formation of unstable compounds

• C.

Low reactivity and the formation of unstable compounds

• D.

High reactivity and the formation of stable compounds

D. High reactivity and the formation of stable compounds
Explanation
Group 1 metals, also known as alkali metals, are known for their high reactivity and the formation of stable compounds. This is because they have only one valence electron, which they readily lose to form a stable octet configuration. As a result, they react vigorously with nonmetals, such as halogens and oxygen, to form ionic compounds with high stability. Their reactivity increases down the group due to the decreasing ionization energy and increasing atomic radius. Therefore, the answer "high reactivity and the formation of stable compounds" accurately describes the characteristic properties of Group 1 metals.

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• 9.

### Which group contains inert (non-reactive) elements?

• A.

Nobel gases

• B.

Alkali metals

• C.

Halogens

• D.

Alkaline earth metals

A. Nobel gases
Explanation
Nobel gases contain inert (non-reactive) elements. These elements have a full outer electron shell, which makes them stable and less likely to react with other elements. They are called "noble" gases because their stable electron configuration is similar to the configuration of the noble gases helium, neon, argon, krypton, xenon, and radon. Due to their non-reactivity, noble gases are often used in various applications, such as lighting, cryogenics, and as inert atmospheres in laboratories.

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• 10.

### Which of the following is a solute?

• A.

Acetone

• B.

Water

• C.

Sugar

• D.

Egg White

C. Sugar
Explanation
Sugar is a solute because it is the substance that is being dissolved in a solvent. In a solution, the solute is the substance present in a smaller amount, while the solvent is the substance present in a larger amount. In this case, sugar would be dissolved in a solvent such as water to form a sugar solution. Acetone, water, and egg white, on the other hand, can act as solvents in certain situations but are not considered solutes in this context.

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• Current Version
• Jun 12, 2023
Quiz Edited by
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• May 22, 2022
Quiz Created by
Sophia Smith

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