Science Flashcards Summer

Question 1

How many letters do chemical symbols have

Answer 1

1 or 2

Question 2

What are groups numbered in

Answer 2

1-7

Question 3

What do two atoms joined together look like

Answer 3

Oxygen - O2 (2 in subscript)

Question 4

What is Mg2+

Answer 4

Magnesium (Two positive)

Question 5

What does a word equation model

Answer 5

A chemical reaction

Question 6

What are reactants

Answer 6

Substances that react together in a chemical reaction

Question 7

What does (s) mean

Answer 7

Solid

Question 8

What does (l) mean

Answer 8

Liquid

Question 9

What does (g) mean

Answer 9

Gas

Question 10

What does (aq) mean

Answer 10

Aqueous Solution

Question 11

What is an aqueous solution

Answer 11

when a substance dissolves in water.

Question 12

How would you balance N2+H2=NH3

Answer 12

N2+3H2=2NH3

Question 13

What is a hazard

Answer 13

something that could cause:

harm to someone
damage to something
adverse health effects, either straightaway or later

Question 14

What does the Skull hazard symbol mean

Answer 14

Toxic

Question 15

What does the tree and fish hazard symbol mean

Answer 15

Harmful to the environment

Question 16

What is a risk

Answer 16

A risk is the chance that a hazard will cause harm.

Question 17

What is a precaution

Answer 17

A precaution is something that can be done to reduce a risk of harm