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.

An atom of Carbon gains 1 proton and loses 1 neutron. Is it still a Carbon Atom?

A Carbon atom gains 1 neutron and loses 1 electron. Is it still a Carbon atom?

In a___________________________________, the number of electrons equals the number of protons. Thus, the number of positive charges equals the number of negative charges.

_______________________________are atoms of the same element that have different numbers of neutrons. Most elements have several of these.

The mass number of an atom can be calculated by which of the following equations:

__________________________________of an element is the average mass of the element’s isotopes, weighted according to the abundance of each isotope.

Elements that spontaneously emit radiation are considered to be ____________________________.

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.

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.

In beta decay, a neutron in an atom changes into a proton and ____________________ called a beta particle.

Gamma rays do not contain ____________, but they do contain a lot of energy.

All 3 types of nuclear decay begin with a(n) __________________.

The process of nuclear decay always results in the original atom changing into a different element.

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.

An atom with a positive charge is called a ________________________________or______________________________.

An atom with a negative charge is called a ________________________________________or _________________________________________.

An atom has: 8 Protons , 8 Neutrons, and 9 Electrons. Does this atom carry an electrical charge?

An atom has: 8 Protons , 8 Neutrons, and 9 Electrons. What is its mass number?

An atom has a mass number of 19, 11 protons, and 10 electrons. How many neutrons are present in the nucleus?

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