Quiz on isotopes/ nuclear reactions Flashcards Preview

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Flashcards in Quiz on isotopes/ nuclear reactions Deck (13):
1

what is indicated from an atomic number?

-number of protons and electrons

2

what is indicated from a mass number?

number of protons and neutrons

3

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

4

define isotopes

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

5

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

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

6

define protons

determine the identity of an element (drivers license)

7

define neutrons

hold the nucleus together and influence mass

8

define electrons

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

9

what is contained in the nucleus

protons/ neutrons

10

density level of nucleus of an atom?

VERY heavy. Holy MOLY

11

state the two kinds of isotopes and define them

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

12

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

13

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)