Unit 2: Atoms, Matter, Periodic Trends: Question Preview (ID: 19162)

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What are the three subatomic particles?
a) protons, neutrons, and neutral
b) protons, positive, and electons
c) protons, neutrons, and negative
d) protons, electrons, and neutrons

What is an isotope?
a) atoms with the same number of protons, but different numbers of neutrons in the nucleus of an atom
b) atoms with the same number of electrons, but different number of protons
c) same number of neutrons, but different number of protons
d) same number of protons and neutrons

This is the total number of protons and neutrons in an atom.
a) mass number
b) atomic number
c) isotope
d) electons

This is the number of protons that exist in an atom.
a) mass number
b) atomic number
c) isotope
d) number of mass

How many protons and neutrons does oxygen have
a) 8 protons and 16 neutrons
b) 16 neutrons and 8 protons
c) 8 protons and 15 neutrons
d) 8 protons and 8 neutrons

Define valence electrons.
a) outermost electrons
b) inner-most electrons
c) middle electrons
d) negatively charged electrons

How many valance electrons does Ca have?
a) 2
b) 1
c) 3
d) 4

Which statement has the correct description of an atom?
a) protons are negatively charged while electrons are positively charged
b) electrons are neutrals with no mass
c) protons are positively charged with mass
d) neutrons are negatively charged with no mass

Sodium is an example of....
a) metal
b) non-metal
c) metaloid
d) noble gas

Which of the following atoms have the largest atomic radius?
a) Li
b) K
c) Na
d) Cs

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