Dr. B's 25-26 PS.8.1.1 & PS.8.1.2 Test Review

A student develops a model of methane (CH₄), as shown.

Identify the substance in the model as an element or a compound.

• Element because it shows only one type of atom and is not held together by a chemical bond.

• Compound because it shows two types of atoms and is held together by a chemical bond.

Tags

NGSS.MS-PS1-1

Which model contains only one compound?

• Q

• R

• S

• T

Tags

NGSS.MS-PS1-1

The ball represents an atom of nitrogen (N).

How many protons, neutrons, and electrons should be included in the atomic model of this atom?

• 7 protons, 2 neutrons, and 7 electrons

• 7 protons, 7 neutrons, and 7 electrons

• 14 protons, 2 neutrons, and 7 electrons

• 14 protons, 7 neutrons, and 7 electrons

Tags

NGSS.MS-PS1-1

Which best illustrates the arrangement of atoms in an element?

• 
• 
• 
• 

Tags

NGSS.MS-PS1-1

Four beakers and their contents are listed below.

Which beaker shows an example of a heterogeneous mixture?

• Beaker 1

• Beaker 2

• Beaker 3

• Beaker 4

Which particle diagram most likely shows carbon dioxide gas?

• 
• 
• 
• 

Select all that are compounds.

Pick up to 5 answers.

• O₂

• KF

• Fe

• Cl₂

• ICl

Common table salt, , is used to season and preserve food. What is table salt?

• a compound

• an element

• a solution

• a mixture

Tags

NGSS.MS-PS1-1

Haven draws a model of a carbon (C) atom using the periodic table. What are the subatomic particles she draws in the nucleus, and how many of each?

• six protons and six neutrons

• six protons and six electrons

• twelve neutrons and six protons

• twelve neutrons and twelve electrons

Tags

NGSS.MS-PS1-1

Espen draws an atomic model for the element neon (Ne) using information from the periodic table. How many protons and electrons does he include in his model?

• seven protons and seven electrons

• ten protons and ten electrons

• ten protons and twenty electrons

• twenty protons and twenty electrons

Tags

NGSS.MS-PS1-1