1 & 2 chem basics/equations

Question 1

What does polyatomic mean?

Answer 1

An ion is polyatomic when there are multiple different atoms (elements) making it up

E.g CO^3 or NH^4

Question 2

How do you use the crossover method?

Answer 2

Al 3+ and 0 2- bond to make Al^2 O^3 because you swap the charges over to give you the numbers of atoms of each element

Question 3

What is important when a transition metal is put into a compound and the compound is displayed as a word equation?

Answer 3

Include the roman numerals after the transition metal

E.g. Iron (III) oxide

the Roman numerals show the charge on the ion

Question 4

What is the state of matter of all acids?

Answer 4

Aqueous (aq) which means dissolved in water

Question 5

Which types of substance are diatomic?

Answer 5

Covalent
Gases

(never metals)

Question 6

If there is any kind of water on the LHS of an equation, what must be true?

Answer 6

There must be water on the RHS

As pure water or as an aqueous substance

Question 7

What are the 3 main “lab” acids?

Answer 7

Nitric
Hydrochloric
Sulfuric

Question 8

Metal + acid –>

Answer 8

Metal salt + H^2

Question 9

Metal + water –>

Answer 9

Metal hydroxide + H^2

Question 10

Metal carbonate + acid –>

Answer 10

Metal salt + carbon dioxide + water