Y9 Chemistry Week 7

What is a reactant?

• The starting substance
• The ending substance

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is a product?

• The starting substance
• The ending substance

Tags

NGSS.MS-PS1-5

Using the following chemical reaction
Hydrogen + Oxygen --> water
Identify the reactant(s).

• Hydrogen and Oxygen
• water

Tags

NGSS.MS-PS1-2

Using the following chemical reaction
Hydrogen + Oxygen --> water
Identify the reactant(s).

• Hydrogen and Oxygen
• water

Using the following chemical reaction
Hydrogen + Oxygen --> water
Identify the product(s).

• Hydrogen and oxygen
• water

Which of the following are NOT signs that a chemical reaction occured?

• the properties changed
• bubbles of gas formed
• color stays the same
• smells different

Tags

NGSS.MS-PS1-2

What is a precipitate?

• a change in color 
• a change in temperature
• a solid formed
• a gas formed

Tags

NGSS.MS-PS1-2

An electron is

• positively charged

• neutral

• negatively charged

Tags

NGSS.MS-PS2-3

Atomic Mass is the number of

• protons and neutrons in the nucleus of an atom

• protons and electrons in the nucleus of an atom

• neutrons and electrons in the nucleus of an atom

Tags

NGSS.MS-PS1-1

An elements is

• a substance that cannot be split into simpler substances

• a substance that can be split into simpler substances