Basic Quiz For 7th Grade Science Elements

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| By Cardinalcm

Cardinalcm

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1/8 Questions

How many electrons are found in the energy level closest to the nucleus?
- 0
- 2
- 8
- 18

About This Quiz

This basic 7th grade science quiz covers fundamental concepts about elements, including electron configuration, valance electrons, and atomic structure.

Basic Quiz For 7th Grade Science Elements - Quiz

2.

How many valance electrons does Neon have?
- 2
- 8
- 18
- 20
- 10
Correct Answer

A. 8

Explanation

Neon has 8 valence electrons. Valence electrons are the electrons in the outermost energy level of an atom. Neon belongs to the noble gas group, which means it has a full outer electron shell. In the case of Neon, its outermost energy level is the second energy level, which can hold a maximum of 8 electrons. Therefore, Neon has 8 valence electrons.

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3.

Silicon is a
- Metal
- Nonmetal
- Metalloid
- Noble gas
Correct Answer

A. Metalloid

Explanation

Silicon is classified as a metalloid. Metalloids are elements that have properties of both metals and nonmetals. Silicon shares characteristics with both metals and nonmetals, making it a metalloid. It is a semiconductor, meaning it can conduct electricity under certain conditions, but not as effectively as metals. Silicon is also brittle like nonmetals, but it can form alloys with metals and has a metallic luster. These properties make silicon a metalloid.

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1
4.

The nucleus of an atom contains
- Electrons
- Electrons & protons
- Electrons & neutrons
- Protons & neutrons
- Only neutrons
Correct Answer

A. Protons & neutrons

Explanation

The nucleus of an atom contains protons and neutrons. Protons have a positive charge, while neutrons have no charge. Electrons, on the other hand, are found outside the nucleus in electron shells. They have a negative charge and orbit around the nucleus. Therefore, the correct answer is protons & neutrons.

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5.

How do you find out the number of electrons an element has?
- Atomic number
- Atomic weight
- Atomic weight - atomic number
- Round the atomic weight
Correct Answer

A. Atomic number

Explanation

The atomic number of an element represents the number of protons in its nucleus, which is also equal to the number of electrons in a neutral atom. Therefore, by knowing the atomic number of an element, we can determine the number of electrons it has.

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6.

Metals have___ or less valance electrons.
- 0
- 2
- 3
- 4
- 5
Correct Answer

A. 3

Explanation

Metals have three or less valence electrons. Valence electrons are the electrons in the outermost energy level of an atom, and they are responsible for the chemical properties of elements. Metals tend to lose electrons to achieve a stable electron configuration, and since they have a small number of valence electrons, they are more likely to lose them. This loss of electrons forms positive ions, which is a characteristic of metals. Therefore, the correct answer is 3.

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7.

Phosophorous is a
- Metal
- Nonmetal
- Metalloid
- Noble gas
Correct Answer

A. Nonmetal

Explanation

Phosphorus is a nonmetal because it is located on the right side of the periodic table, in the p-block. Nonmetals generally have properties such as low melting and boiling points, poor conductivity of heat and electricity, and tend to gain electrons in chemical reactions. Phosphorus exhibits these characteristics, making it a nonmetal.

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1
8.

How many neutrons does Copper have?
- 29
- 64
- 10
- 8
- 35
Correct Answer

A. 35

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Nov 01, 2024

Quiz Edited by
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Mar 29, 2007

Quiz Created by
Cardinalcm

Basic Quiz For 7th Grade Science Elements

How many electrons are found in the energy level closest to the nucleus?

Quiz Preview

How many valance electrons does Neon have?

Silicon is a

The nucleus of an atom contains

How do you find out the number of electrons an element has?

Metals have___ or less valance electrons.

Phosophorous is a

How many neutrons does Copper have?