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Atoms Flashcards | StudBud

Atoms

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atoms

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Questions 12

Answers

1
What is the basic unit of matter called?
Atom
Cell
Nucleus
Neutron
2
The nucleus of an atom is composed of
protons and neutrons
protons and electrons
protons alone
neutrons and electrons
3
Which of these is a characteristic of an atom?
The charge of an atom is always negative
The charge of an atom is always postive
It has the characteristic properties of a chemical element
The number of protons and neutrons must always be the same
4
Which of these is not among the main particles of an atom?
neutron
positron
electron
proton
5
What are isotopes?
atoms that have lost or gained an electron
forms of the same element with a different neutron number
atoms with an electric charge
identical atoms
6
What is an element?
a chemical compound made of identical atoms
a class of atoms that have the same number of protons
a synthesized atom
a chemical that occurs naturally on Earth
7
What does the number 8 represent?
atomic number
atomic mass
number of electrons
atomic weight
8
What do different colors in a table of elements represent?
Isotopes of the same element
Elements that share an atomic mass
Elements that have similar chemical and physical properties
Natural elements and their synthetic counterparts
9
How are elements ordered in the periodic table?
By the number of protons in an element
By abundance on Earth
By the number of isotopes
By the atomic mass
10
What is an ion?
An atom with an unequal number of protons and electrons
An atom with a charge
An atom that has lost or gained an electron
All of the above
11
What is special about a hydrogen atom?
It has no protons
It is both a gas and a metal
It has no neutrons
It has no electrons
12
The center of an atom is called
an inner core
a neutron
a nucleus
a positron