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Unit 2 Review
Test Description: Use this as review
Instructions: Answer all questions to get your test result.
1) How many protons and neutrons in boron-11?
A
5 p 11 n
B
11 p 5 n
C
5 p 6 n
D
11 p 6 n
2) The number of which type of particle determines the identity of an element?
A
photons
B
neutrons
C
electrons
D
protons
3) The sum of the protons and neutrons in an atom.
A
atomic number
B
atomic mass
C
allotrope number
D
isotope number
4) Identifies the type of element and also gives you the number of protons.
A
atomic mass
B
atomic number
C
isotope number
D
allotrope number
5) Which describes an atom with an atomic number of 17
A
17 protons 17 neutrons
B
17 protons 19 neutrons
C
18 protons 17 neutrons
D
17 protons 17 electrons
6) Which describes an atom with an atomic number of 6
A
6 protons 6 neutrons
B
6 protons 7 neutrons
C
6 protons 8 neutrons
D
8 protons and 6 neutrons
7) Identify the atom with the atomic number 19
A
flourine
B
potassium
C
chlorine
D
sodium
8) An atom has 20 protons, 20 electrons, and 20 neutrons. What is its mass number?
A
20
B
60
C
40
D
18
9) Which of the following statements best describes the nucleus of a neutral atom in terms of density and charge?
A
It is not very dense and has zero charge.
B
It is highly dense and positively charged.
C
It is highly dense and has zero charge
D
It is not very dense and is negatively charged.
10) Atoms of the same element with different numbers of neutrons are called ____.
A
allotropes
B
radioactive elements
C
isotopes
D
metalloids
*select an answer for all questions
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