Chem Test - Fill In The Blank

Question 1

Name the groups (alkali metals, halogens, etc.) - what are their trends?

Question 2

Classification of Matter

Answer 2

Mechanical/Heterogeneous: different parts are visible (pizza)

Solution/Homogeneous: looks the same throughout

Element: 1 atom, cannot be broken down

Compound: 2+ atoms, can be broken down

Question 3

Types of equations (word, balanced, skeletal)

Answer 3

Word: chemical equation writing in words (magnesium + oxygen gas —> magnesium oxide)

Skeletal: chemical formulas of all the reactants and products (Mg + O2 —> MgO)

Balanced: ensures the law of conservation of mass is true. Big # infront is added so the same # of each type of element is on both sides of the equation (2Mg + O^2 —> 2MgO)

Question 4

Components of a Chemical Equation

Answer 4

Reactants —> (yield) products

Question 5

Location of Subatomic Particles

Answer 5

Protons & Neutrons: inside nucleus
Electrons: outside nucleus (shells)

Question 6

7 Diatomic Gases

Answer 6

H, Br, I, N, Cl, O, F