Quiz on isotopes/ nuclear reactions Flashcards Preview

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Flashcards in Quiz on isotopes/ nuclear reactions Deck (13):

what is indicated from an atomic number?

-number of protons and electrons


what is indicated from a mass number?

number of protons and neutrons


what is atomic mass?

-weighted average mass of atoms naturally occurring that sample of the element
-reflects both mass and relative abundance of isotopes
-whole number = does not naturally occur in nature


define isotopes

-atoms that have the same number of protons but different number of neutrons
-have different mass numbers


what does each part of the following equation mean?
a/z C

a= protons/neutrons or atomic mass
z= protons
C= element name


define protons

determine the identity of an element (drivers license)


define neutrons

hold the nucleus together and influence mass


define electrons

determine the chemical properties of an element (who you are)


what is contained in the nucleus

protons/ neutrons


density level of nucleus of an atom?

VERY heavy. Holy MOLY


state the two kinds of isotopes and define them

stable: nucleus stays in tact
unstable: nucleus decays and emits radiation


define fission and fusion, also what they are responsible for

Fission: when the atom divides into smaller parts (fission is division) responsible for nuclear energy and bombs
Fusion: when 2+ atoms fuse together to become one, responsible for stars and new elements


name the 3 types of decay and define them

alpha: nucleus ejects 2 protons and neutrons simultaneously (atomic number goes down 2, atomic weight goes down 4)
beta: neutron splits into proton and electron (atomic number goes up 1)
gamma: no change, just emits radiation (deadly)