Unit 1
What does the prefix anti- mean?
Against
The shape on an apple is a _____.
Physical property
Elements in group 18 on the periodic table are considered
Noble gases
Each metal in Group 2 on the periodic table loses both its outer electrons in bond, so each has an oxidation number of _____.
2+
In a chemical equation, the symbol that means aqueous is ______.
(aq)
What does the prefix sub- means?
Below
Colloid
Why do Noble gases NOT form compounds readily?
Their outer energy levels are completely filled with electrons
A chemical bond that occurs when atoms share electrons is a(n) ______ bond.
According to the law of conservation of mass, if two atoms of hydrogen are used as a reactant, how many atoms of hydrogen must be part of the product?
2
What does the prefix kilo- mean
1,000
Shredding paper is a ________.
Physical change
Horizontal rows of the periodic table are called
Periods
A positively charged ion is called a(n) _____.
What type of reaction is: AB + C --> AC + B
Single replacement
Particles within a solid, _______.
Vibrate about a fixed position
A bottle of Italian salad dressing says, "Shake Well Before Using" because it is a(n) ______.
Suspension
Lathanides and Actinides are in what group of elements?
Rare-Earth
In general, metals tend to form ______ charged ions by losing electrons while nonmetals form ______ charged ions by gaining electrons.
positively; negatively
What type of reaction is AB + CD --> AC + BD
Double displacement
Which variable represents the y-axis?
The dependent variable
A ______ is a homogenous mixture of particles so small they cannot be seen and will NOT settle to the bottom of their container.
Solution
A certain atom has 26 protons, 26 electrons and 30 neutrons. It's mass number is _____.
56
How many total atoms make the compound (NH4)3PO4?
20
Identify the missing coefficient to balance the chemical equations:
2 H2O2 -->__ H2O + 1 O2
2