Composition And Properties Of Matter (Part 2) Question Preview (ID: 44844)


Composition And Properties Of Matter (Part 2).

An atom with a negative charge is called a ________________________________________or _________________________________________.
a) negative ion / anion
b) negative ion / cation
c) positive ion / anion
d) positive ion/ cation

An atom has: 8 Protons , 8 Neutrons, and 9 Electrons. Does this atom carry an electrical charge?
a) No - It has an equal amount of protons and neutrons
b) Yes - It has a negative charge
c) Yes - It has a positive charge
d) Not enough information provided to answer the question

An atom with a positive charge is called a ________________________________or______________________________.
a) negative ion / anion
b) negative ion / cation
c) positive ion / anion
d) positive ion/ cation

A(n) ________________________________is an atom that is no longer neutral because it has gained or lost electrons. An ion can be positively or negatively charged, depending on whether it has lost or gained electrons.
a) isotope
b) neutral atom
c) ion
d) metalloid

The process of nuclear decay always results in the original atom changing into a different element.
a) True
b) False - Alpha and Beta decay change the element, but Gamma decay does not.
c) False - Beta and Gamma decay change the element, but Alpha does not.
d) It depends on the amount of electrons

All 3 types of nuclear decay begin with a(n) __________________.
a) stable nucleus
b) unstable nucleus
c) ionic charge
d) positron

Gamma rays do not contain ____________, but they do contain a lot of energy.
a) particles
b) radiation
c) isotopes
d) ions

In beta decay, a neutron in an atom changes into a proton and ____________________ called a beta particle.
a) a high energy proton is released
b) a neutral particle is released
c) a high energy neutron is released
d) a high energy electron is released

Alpha Decay: An alpha particle is made of __________________. When an atom releases an alpha particle, its atomic number decreases by two. Uranium-238 decays to thorium-234 through the process.
a) 1 proton and 1 neutron
b) 2 protons and 2 neutrons
c) 1 high energy electron
d) None of These

Elements that are radioactive contain unstable nuclei. ______________________________is a process that occurs when an unstable atomic nucleus changes into another more stable nucleus by emitting radiation.
a) Isotropic Decay
b) Radioactive Decay
c) Nuclear Decay
d) None of These

Elements that spontaneously emit radiation are considered to be ____________________________.
a) radioactive
b) ionic
c) absolutely deadly to humans
d) always safe for humans to be exposed to

__________________________________of an element is the average mass of the element’s isotopes, weighted according to the abundance of each isotope.
a) Mass Number
b) Atomic Number
c) Average Atomic Mass
d) Average Atomic Number

The mass number of an atom can be calculated by which of the following equations:
a) # of Protons - # of Electrons = Mass #
b) # of Protons + # of Electrons = Mass #
c) # of Electrons + # of Neutrons = Mass #
d) # of Protons + # of Neutrons = Mass #

_______________________________are atoms of the same element that have different numbers of neutrons. Most elements have several of these.
a) Ions
b) Allotropes
c) Valence atoms
d) Isotopes

In a___________________________________, the number of electrons equals the number of protons. Thus, the number of positive charges equals the number of negative charges.
a) neutral atom
b) positive ion
c) negative ion
d) anion

A Carbon atom gains 1 neutron and loses 1 electron. Is it still a Carbon atom?
a) Yes
b) No
c) It depends on the amount of electrons
d) It depends on the amount of electrons

An atom of Carbon gains 1 proton and loses 1 neutron. Is it still a Carbon Atom?
a) Yes
b) No
c) It depends on the amount of electrons
d) It depends on the amount of electrons

The number of protons in an atom of an element is the element’s____________________________________. It is the whole number listed with each element on the periodic table.
a) mass number
b) average atomic mass
c) ionic charge
d) atomic number

An atom has: 8 Protons , 8 Neutrons, and 9 Electrons. What is its mass number?
a) 9
b) 17
c) 16
d) 25

An atom has a mass number of 19, 11 protons, and 10 electrons. How many neutrons are present in the nucleus?
a) 21
b) 8
c) 9
d) 10

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