8th Grade Review

8th Grade Review

8th Grade

•

145 Qs

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8th Grade Review

8th Grade Review

Assessment

Quiz

•

Biology, Physics, Chemistry

•

8th Grade

•

Medium

Created by

Melissa Cross

Used 48+ times

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145 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Media Image

An atom of an element has 36 protons, 36 electrons, and a mass number of 84? How many neutrons?

36

72

48

8

2.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

What types of particles are found in the cloud surrounding the atom's nucleus?

positively and negatively charged particles

negatively charged particles only

neutral and positively charged particles

positively charged particles only

3.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Media Image

What is the mass number of a potassium (K) atom that has 20 neutrons?

18

19

20

39

4.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Which of the following is the best description of an electron?

No charge and the same mass as a proton

negative charge and much less mass than a proton

positive charge and much more mass than a neutron

negative charge and the same mass of a neutron

5.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Media Image

An atom has 25 protons, 30 neutrons, and 25 electrons. What is the charge of the nucleus?

+55

-25

+25

-30

6.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Media Image

Tin (Sn) is a soft, white metal. Which statement accurately describes an atom of tin?

tin atoms have five valence electrons

tin atoms have 68 electrons

tin atoms have 50 protons

tin atoms have 119 neutrons

7.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Media Image

Atoms of a certain element have 11 protons and 1 valence electron. Which statement is correct?

the element is sodium and it is not reactive

the element is fluorine and it is highly reactive

the element is fluorine and it is not reactive

the element is sodium and it is highly reactive

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