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Q 1/27
Score 0
At room temperature, most metals are
30
gases
solids
liquids
Q 2/27
Score 0
The process by which solid iodine particles change directly to gas without first becoming a liquid is called
30
condensation
sublimation
evaporation
27 questions
Q.
At room temperature, most metals are
1
30 sec
Q.
The process by which solid iodine particles change directly to gas without first becoming a liquid is called
2
30 sec
Q.
The elements in Groups 3 through 12 of the periodic table are the
3
30 sec
Q.
Metals can be used as wire because they are
4
30 sec
Q.
The only metal that is a liquid at room temperature is
5
30 sec
Q.
A synthetic element that is used in smoke detectors is
6
30 sec
Q.
Cobalt, iron, and nickel are knows as the _____ triad.
7
30 sec
Q.
The noble gases are in _____.
8
30 sec
Q.
How many electrons are needed in the outer energy levels of most atoms for the atom to be chemically stable?
9
30 sec
Q.
How many hydrogen atoms are present in one molecule of ammonium acetate, NH4C2H3O2?
10
30 sec
Q.
A(n) chemical equation has the same number of atoms of each element on each side of the equation.
11
30 sec
Q.
Each substance on the left side of the arrow in a chemical equation is a ______.
12
30 sec
Q.
Which of the following could represent a decomposition reaction?
13
30 sec
Q.
A substance that speeds up a chemical reaction without being permanently changed itself is a(n) ________.
14
30 sec
Q.
The breaking down of a substance into two or more simpler substances is _______.
15
30 sec
Q.
Each substance to the right of the arrow in a chemical equation is a(n) _______.
16
30 sec
Q.
According to the law of conservation of mass, how does the mass of the products in a chemical reaction compare to the mass of the reactants?
17
30 sec
Q.
the properties of a compound are the same as the properties of the elements making up the compound
18
30 sec
Q.
because a water molecule has a slight positive charge at one end and a slight negative charge at the other end, it is a nonpolar molecule
19
30 sec
Q.
particles formed from the covalent bonding of atoms are called ions
20
30 sec
Q.
molecules are neutral
21
30 sec
Q.
a term that means "without water" is anhydrous
22
30 sec
Q.
When an atom gains or loses electrons, the charged particle that results is called a molecule
23
30 sec
Q.
the formula SO42- stands for ammonium
24
30 sec
Q.
an atom is chemically unstable when its outer energy level contains all the electrons it can hold
25
30 sec
Q.
The chlorine atoms in hydrogen chloride have a stronger attraction for the electrons than the hydrogen atoms do. The hydrogen chloride molecule is therefore a nonpolar covalent molecule.
26
30 sec
Q.
an element's oxidation number indicates how many electrons the element must gain, lose, or share to become stable
