LRA 211 KEY TERMS QUESTIONS
AND ANSWERS WITH COMPLETE
SOLUTIONS 100% CORRECT!!!
The basic building block of matter, described as having three fundamental
components: electrons, neutrons, and protons.
Answer: Atom
The number of protons and neutrons an atom has in its nucleus.
Answer: Atomic mass number
The number of protons in the nucleus of an atom, which also indicates the
number of electrons in a stable atom.
Answer: Atomic number
A molecule that contains at least two different elements.
Answer: Compound
A bond based on two atoms sharing electrons that then orbit both nuclei,
completing the outermost shell of each.
Answer: Covalent bond
A subatomic particle with one unit of negative electrical charge and a mass
significantly less than that of protons or neutrons, orbiting the nucleus at high
velocities.
Answer: Electron
The simplest form of substances that compose matter, made up of one unique
type of atom with an unchanging number of protons.
Answer: Element
, A bond based on the attraction between atoms of opposite charge, occurring
when one atom gives up an electron (becoming a cation with a net positive
charge) and another atom takes on that electron (becoming an anion with a
net negative charge).
Answer: Ionic bond
Formed when two or more atoms join together chemically. -
ANSWER✔✔molecule
A component of the nucleus with no electrical charge and a specific mass,
contributing to the majority of an atom's mass along with protons. -
ANSWER✔✔neutron
The central part of an atom, made up of protons and neutrons (collectively called
nucleons) and is the core around which electrons orbit. -ANSWER✔✔nucleus
A component of the nucleus with one unit of positive electrical charge and a
specific mass, contributing to the atomic number of an atom. -ANSWER✔✔proton
Physical particles originating from radioactive atoms, composed of two protons
and two neutrons (the same makeup of the nucleus of a helium atom), with a net
positive charge. -ANSWER✔✔alpha particles
Electrons emitted from an unstable nucleus; they do not originate in an electron
shell. -ANSWER✔✔beta particles
AND ANSWERS WITH COMPLETE
SOLUTIONS 100% CORRECT!!!
The basic building block of matter, described as having three fundamental
components: electrons, neutrons, and protons.
Answer: Atom
The number of protons and neutrons an atom has in its nucleus.
Answer: Atomic mass number
The number of protons in the nucleus of an atom, which also indicates the
number of electrons in a stable atom.
Answer: Atomic number
A molecule that contains at least two different elements.
Answer: Compound
A bond based on two atoms sharing electrons that then orbit both nuclei,
completing the outermost shell of each.
Answer: Covalent bond
A subatomic particle with one unit of negative electrical charge and a mass
significantly less than that of protons or neutrons, orbiting the nucleus at high
velocities.
Answer: Electron
The simplest form of substances that compose matter, made up of one unique
type of atom with an unchanging number of protons.
Answer: Element
, A bond based on the attraction between atoms of opposite charge, occurring
when one atom gives up an electron (becoming a cation with a net positive
charge) and another atom takes on that electron (becoming an anion with a
net negative charge).
Answer: Ionic bond
Formed when two or more atoms join together chemically. -
ANSWER✔✔molecule
A component of the nucleus with no electrical charge and a specific mass,
contributing to the majority of an atom's mass along with protons. -
ANSWER✔✔neutron
The central part of an atom, made up of protons and neutrons (collectively called
nucleons) and is the core around which electrons orbit. -ANSWER✔✔nucleus
A component of the nucleus with one unit of positive electrical charge and a
specific mass, contributing to the atomic number of an atom. -ANSWER✔✔proton
Physical particles originating from radioactive atoms, composed of two protons
and two neutrons (the same makeup of the nucleus of a helium atom), with a net
positive charge. -ANSWER✔✔alpha particles
Electrons emitted from an unstable nucleus; they do not originate in an electron
shell. -ANSWER✔✔beta particles
