8th Grade Comp 2

8th Grade Comp 2

7th Grade

46 Qs

quiz-placeholder

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8th Grade Comp 2

8th Grade Comp 2

Assessment

Quiz

Chemistry

7th Grade

Hard

Created by

Sierra Leggett

Used 1+ times

FREE Resource

46 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following solids uses a "sea" of electrons to hold its shape?

Mn (s)

H₂O (s)

NaCl (s)

H₂ (s)

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which statement best describes metallic bonding?

It is the electrostatic interaction between the positive metal ions and delocalized electrons.

It is the electrostatic interaction between the electrons and delocalized protons.

It is delocalized electrons.

It is delocalized protons.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following statements is FALSE when describing the properties of a metal due to its “sea of electrons” bonding model?

Metals are great conductors because their electrons are free to flow throughout the material.

Metals are malleable because bonds can be easily broken and reformed.

Metals have a low boiling point because metal atoms are weakly bonded to one another and have weak attractive forces.

Metals are shiny because light cannot penetrate the surface of the metal and are therefore reflected off the surface.

4.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

What is the molar mass of barium bromide?

1.72 g/mol

297.1 g/mol

217.2 g/mol

354.6 g/mol

5.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

You set up an experiment to react 1.00 g lead (Pb) and 1.00 g sulfur (S). Which of the two samples contains more atoms?

There are more atoms of S than Pb.

There are more atoms of Pb than S.

There are equal numbers of atoms in both samples.

Can’t determine because moles of each compound are not provided.

6.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

How many molecules are present in 22 moles of CO₂?

44 molecules

6.35 x 10²³ molecules

968 molecules

1.32 x 10²⁵ molecules

7.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

I have 2.3 mols of lithium chloride. How many grams of lithium chloride do I have?

2.3 grams

97.5 grams

42.39 grams

0.05 grams

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