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8.5ABC Review

Authored by Kyla Hardaway

Science

8th Grade

NGSS covered

Used 9+ times

8.5ABC Review
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15 questions

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1.

MULTIPLE CHOICE QUESTION

45 sec • 2 pts

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

2.

MULTIPLE CHOICE QUESTION

45 sec • 2 pts

Which characteristic of calcium is most closely related to its chemical reactivity?

20 protons in each calcium atom

calcium's density is 1.54 g.cm3

2 valence electrons in each atom of calcium

one calcium atom has an atomic mass of 40.078 amu

3.

MULTIPLE CHOICE QUESTION

45 sec • 2 pts

Media Image

Based on the data, which number shows the correct location of the element with 2 valence electrons and 1 energy levels.

1

2

3

4

4.

MULTIPLE CHOICE QUESTION

45 sec • 2 pts

The nucleus of the atom contains 8 protons and 9 neutrons. The atom is electrically neutral. How many electrons does this atom have?

1

8

9

15

Tags

NGSS.MS-PS1-1

5.

MULTIPLE CHOICE QUESTION

45 sec • 2 pts

Which 2 subatomic particles determine the mass of the atom?

Neutrons and Electrons

Electrons and Protons

Protons and Neutrons

6.

MULTIPLE CHOICE QUESTION

45 sec • 2 pts

Which element is a metalloid?

Aluminum (Al)

Selenium (Se)

Potassium (K)

Antimony (Sb)

7.

MULTIPLE CHOICE QUESTION

45 sec • 2 pts

Fluorine is a halogen and a nonmetal that is extremely toxic to humans. When combined with other elements it has many uses, including preventing tooth decay. Which information below identifies Fluorine (F)?

9 protons

9 neutrons

19 electrons

19 protons

Tags

NGSS.MS-PS1-1

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