Chemistry Chapter 2

Matter can not be created nor destroyed: it can only be

• Destroyed a little bit
• Invisible
• Transformed, changed
• None of the above

Tags

NGSS.MS-PS1-5

The law of conservation of mass says substances can neither be _______ nor ___________.

• Built; torn down

• Blended together; separated

• Created; destroyed

• Condensed; extracted

Tags

NGSS.MS-PS1-5

In a chemical reaction, 4 grams of sodium must combine with how many grams of chlorine to produce 10 grams of table salt?

• 4 grams

• 6 grams

• 8 grams

• 10 grams

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-1

NGSS.MS-PS1-2

The copper cycle, shown below, is a demonstration of what principle of chemistry?

• Metals are excellent conductors

• Most elements are metallic solids

• elements exists as gases, liquids, or solids

• mass is conserved in physical and chemical changes

Tags

NGSS.MS-PS1-5

. When elemental copper is added to a solution of nitric acid a chemical reaction takes place producing nitrogen dioxide gas, water, and a solution of copper nitrate in step 2. Which of the following observation(s) indicates a chemical change has taken place?

I. Bubbles appear in the beaker

II. The beaker feels hot

III. The copper nitrate dissolves in the water

• I and II

• I and III

• I

• II

Tags

NGSS.MS-PS1-2

All elements in the same period have the same number of _______ in their electron cloud

What is the name of the group Beryllium is in?

The properties of Carbon are expected to be similar to those of ...

• phosphorus

• silicon

• boron

• aluminum

Tags

NGSS.MS-PS1-1

What group is known as the Halogens?

• Group 2

• Group 18

• Group 17

The vertical (up and down) columns in the Periodic Table are called

• groups

• towers

• periods

• atomic numbers