Unit 2 Review Question Preview (ID: 33660)


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Which of the following statements best describes the nucleus of a neutral atom in terms of density and charge?
a) It is highly dense and positively charged.
b) It is not very dense and has zero charge.
c) It is not very dense and is negatively charged.
d) It is highly dense and has zero charge

Identify the atom with the atomic number 19
a) potassium
b) sodium
c) chlorine
d) flourine

An atom has 20 protons, 20 electrons, and 20 neutrons. What is its mass number?
a) 40
b) 60
c) 20
d) 18

Which describes an atom with an atomic number of 6
a) 6 protons 6 neutrons
b) 6 protons 8 neutrons
c) 8 protons and 6 neutrons
d) 6 protons 7 neutrons

Which describes an atom with an atomic number of 17
a) 17 protons 17 electrons
b) 17 protons 17 neutrons
c) 18 protons 17 neutrons
d) 17 protons 19 neutrons

The sum of the protons and neutrons in an atom.
a) atomic mass
b) isotope number
c) allotrope number
d) atomic number

Identifies the type of element and also gives you the number of protons.
a) atomic number
b) atomic mass
c) isotope number
d) allotrope number

How many protons and neutrons in boron-11?
a) 5 p 6 n
b) 5 p 11 n
c) 11 p 5 n
d) 11 p 6 n

The number of which type of particle determines the identity of an element?
a) protons
b) electrons
c) neutrons
d) photons

Atoms of the same element with different numbers of neutrons are called ____.
a) isotopes
b) allotropes
c) metalloids
d) radioactive elements

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