Semester 2 - Cycle 2 : 9th Week Exam 2018

Cu⁺combines with O^-2 to form

• Cu₂O
• Cu₂O₂
• Cu⁺²O
• CU⁺¹O₃

The name of NF₃ is

• nitrogen flouride
• nitrogen triflouride
• nitrogen trifluoride
• nitrogen (III) fluoride

If my charge becomes 2+ what does that say about me?

• I am stealing 2 electrons
• I am losing 2 electrons
• I am in period 2
• I have an atomic # of 2

When metals bond with non-metals they form what type of bonds

• covalent
• ionic
• cooperative
• lewis

How many valence electrons does a bromine atom have?

• 1
• 2
• 6
• 7

What is the correct formula for this molecule?

• Si₄F
• SiF₄
• SiF
• Si₄F₄

This could be the dot diagram of

• Mg
• Cl
• C
• O

Symbols that show the elements and their ratio in a compound

• periodic formula
• ionic formula
• chemical formula
• covalent formula

In chemical reactions, what does the principle of conservation of mass mean?

• Matter is not created or destroyed.
• The total mass of the reactants is greater than the total mass of the products.
• The total mass of the reactants is less than the total mass of the products.
• Matter is not changed.
  

Identify the reactant(s) and product(s) of the reaction.

• All three are reactants and none are products.
• Hydrogen and water are the reactants, and oxygen is the product.
• Water and oxygen are the reactants, and hydrogen is the product.
• Hydrogen and oxygen are the reactants, and water is the product.