Nature Of Matter Question Preview (ID: 15929)
Basic Principles Of Chemistry (Section 2.1).
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The three particles that make up atoms are _____.
a) protons, neutrons, and isotopes.
b) positives, negatives, and neutrals
c) neutrons, isotopes and electrons
d) protons, neutrons and electrons
What particles are found in a cloud surrounding the nucleus of an atom?
a) protons
b) neutrons
c) electrons
d) isotopes
Isotopes are atoms of the same element with the same number of protons and a different number of ___.
a) protons
b) neutrons
c) electrons
d) ions
What type of ion forms when an atom loses electrons?
a) positive
b) negative
c) neutral
d) radioactive
Scientists show the composition of compounds by a kind of shorthand known as a chemical formula.
a) true
b) false
c)
d)
If an atom contains 11 protons and 12 neutrons, its atomic number is ____.
a) 1
b) 45
c) 23
d) 11
If an atom contains 3 protons, 4 neutrons, and 3 electrons, its mass number is ____.
a) 3
b) 7
c) 6
d) 10
A covalent bond is formed as the result of ____.
a) transferring electrons
b) transferring protons
c) sharing electrons
d) sharing protons
Of the three subatomic particles, _____ are most involved in forming chemical bonds.
a) protons
b) neutrons
c) electrons
d) isotopes
Which of the following is a substance formed by the chemical joining of two or more elements in definite amounts?
a) compound
b) isotope
c) nucleus
d) enzyme
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