Vocabulary | Atoms | True or False | Fill in the blank | Atomic Structure |
---|---|---|---|---|
smallest particle into which an element can be divided
Atom
|
What is a positively charged particle located in the nucleus of an atom
Proton
|
An atom has no mass
False
|
in greek the word atoms mean
Atoms
|
protons 29 What is the atomic mass
neutrons 35 Electrons 29
64
|
An abbreviation or short representation of a chemical element
Chemical symbol
|
Sum of the number of protons and neutrons in the nucleus of an atom
atomic mass
|
To find the atomic mass we add the protons and electrons
False
|
An atom has the _____ number of protons and electrons
same
|
Protons 5
Neutrons 6 What is the electrons
5
|
negatively charged particle located in a cloudlike formation that surrounds the nucleus
Electron
|
outer shell of the atom
Valence electron
|
Electrons are located in an electron cloud
True
|
Protons and neutron are packed_______ in the nucleus
tightly
|
atomic mass 23
Electrons 11 What is the protons?
11
|
positively charged mass within an atom, composed of neutrons and protons.
Nucleus
|
Same as the number of positive charges or protons in the nucleus of an atom of a given element
atomic number
|
There are 120 known element
True
|
protons, electrons, and neutrons have _________charges
different
|
Atomic mass 27
protons 13 Electrons 13 What is the neutrons
14
|
Pure substance that can't be separated into simpler substance by physical or changes
Element
|
AMU means
Atomic mass unit
|
Atomic number equal atomic mass
False
|
the plus and minus charges of an atom ________each other
cancel out
|
Atomic number 15
Neutrons 16 What is the protons
15
|