Mid Summative 1 2 Answers

Which elements are in the following substances?

Substance Chemical Formula

Names of elements

Water H2O Hydrogen, Oxygen

Sucrose C12H22O11 Carbon, hydrogen,

oxygenOzone O3 Oxygen

Lead acetate Pb(C2H3O2)2 Lead, Carbon,

Hydrogen, Oxygen

Ammonium carbonate

(NH4)2CO3 Nitrogen, Hydrogen,

Carbon, Oxygen

What is the difference between Ni and NI?

•Ni is the symbol for the element Nickel

•NI is the symbol for 2 elements, Nitrogen and Iodine

What is a substance?

A form of matter that is different

from every other form of matter

Which are substances?

•Ni•Co•Fe

•CO

•CaCO3

•MgSO4

How are elements & matter related?

Elements are the building

blocks of matter

Why was the mystery mixture a chemical

reaction?A chemical reaction is the combination of 2 or more

substances that results in a new substance. We combined the

mystery mixture with water and a gas (bubbles) formed which is a

new substance