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Q 1/30
Score 0
Which statement describes the charge of an electron and the charge of a proton?
30
An electron and a proton both have a charge of +1.
An electron has a charge of +1, and a proton has a charge of -1
An electron has a charge of -1, and a proton has a charge of +1.
An electron and a proton both have a charge of -1
Q 2/30
Score 0
Which subatomic particles are found in the nucleus of an atom of beryllium?
30
electrons and protons
neutrons and electrons
electrons and positrons
neutrons and protons
30 questions
Q.
Which statement describes the charge of an electron and the charge of a proton?
1
30 sec
Q.
Which subatomic particles are found in the nucleus of an atom of beryllium?
2
30 sec
Q.
The elements in Period 4 on the Periodic Table are arranged in order of increasing
3
30 sec
Q.
Which phrase describes two forms of solid carbon, diamond and graphite, at STP?
4
30 sec
Q.
Which element has six valence electrons in each of its atoms in the ground state?
5
30 sec
Q.
What is the chemical name for H2SO3(aq)?
6
30 sec
Q.
Which substance is most soluble in water?
7
30 sec
Q.
Which type of bonding is present in a sample of an element that is malleable?
8
30 sec
Q.
Which atom has the greatest attraction for the electrons in a chemical bond?
9
30 sec
Q.
Which type of reaction involves the transfer of electrons?
10
30 sec
Q.
A 10.0-gram sample of nitrogen is at STP. Which property will increase when the sample is cooled to 72 K at standard pressure?
11
30 sec
Q.
Which element is a gas at STP?
12
30 sec
Q.
A 5.0-gram sample of Fe(s) is to be placed in 100. milliliters of HCl(aq). Which changes will result in the fastest rate of reaction?
13
30 sec
Q.
Which process is commonly used to separate a mixture of ethanol and water?
14
30 sec
Q.
A sample of hydrogen gas will behave most like an ideal gas under the conditions of
15
30 sec
Q.
The collision theory states that a reaction is most likely to occur when the reactant particles collide with the proper
16
30 sec
Q.
At STP, which sample contains the same number of molecules as 3.0 liters of H2(g)?
17
30 sec
Q.
The addition of a catalyst to a chemical reaction provides an alternate pathway that
18
30 sec
Q.
A sample of water is boiling as heat is added at a constant rate. Which statement describes the potential energy and the average kinetic energy of the water molecules in this sample?
19
30 sec
Q.
Entropy is a measure of the
20
30 sec
Q.
Which element has atoms that can bond with each other to form ring, chain, and network structures?
21
30 sec
Q.
What is the number of electrons shared in the multiple carbon-carbon bond in one molecule of 1-pentyne?
22
30 sec
Q.
Butanal, butanone, and diethyl ether have different properties because the molecules of each compound differ in their
23
30 sec
Q.
What occurs when a magnesium atom becomes a magnesium ion?
24
30 sec
Q.
Energy is required to produce a chemical change during
25
30 sec
Q.
The reaction of an Arrhenius acid with an Arrhenius base produces water and
26
30 sec
Q.
One acid-base theory defines an acid as an
27
30 sec
Q.
Which phrase describes the decay modes and the half-lives of K-37 and K-42?
28
30 sec
Q.
Which particle has a mass that is approximately equal to the mass of a proton?
29
30 sec
Q.
Which change occurs during a nuclear fission reaction?