Vocab
Protons and neutrons are located in the center of an atom called the _________.
Nucleus
The subatomic particle with a positive charge.
Proton
N, C, Pb, and Ne are symbols for ________.
Elements
All matter is made up of tiny particles called ______.
Atoms
What kind of electric charge does a normal atom have?
Neutral
This determines the identity of an element. (Hint: this is equal to the atomic number)
# of Protons
The subatomic particle with a negative charge.
Electron
Where do you look to find the atomic number of an element?
The top corner.
Almost all of the mass of an atom is found in the _________.
Nucleus
Where do you look to find the atomic mass/mass number?
The bottom of the box below the name and symbol.
Horizontal rows are called _________ while vertical columns are called ___________.
Periods and Groups.
This subatomic particle has no charge (it's neutral).
Neutron
The noble gas family is located in group ___ on the periodic table.
18
What are the elements in group 17 called?
Halogens
Where are electrons located?
In the electron shell/cloud.
Charged atoms.
Ions
The mass number/atomic mass depends on the number of __________ and ___________.
Protons and neutrons.
Elements in groups 3 through 12 are called the ___________________.
Transition metals
What is the mass number of an atom that contains 30 protons, 30 electrons, and 35 neutrons?
65
For the element Nitrogen, what is the mass number, atomic number, and classification (metal, nonmetal, metalloid)?
Mass number=14, Atomic number=7, and classification=nonmetal
Define isotopes.
Atoms that have the same number of protons but different numbers of neutrons.
How many protons, neutrons, and electrons does the element Sodium (Na) have?
11 protons, 12 neutrons, and 11 electrons.
How do you find the number of neutrons?
Atomic mass - Atomic number.
Electrons in the highest energy level/outermost shell are called ___________________.
Valence electrons
For the isotope Cobalt-62, how many protons, neutrons, and electrons does it have?
27 protons, 35 neutrons, and 27 electrons.