Atoms Family
What is the weight of an atom called? This is the total of the protons and neutrons.
Atomic Mass
How would you describe a neutron's charge?
No charbge/Uncharged/ neutral
As you read the Periodic Table from left to right the atomic mass _______.
A. Increases
B: Decreases
C: Stays the same
A: Increases
What two particles must be equal to form a neutral atom?
What is: protons and electrons
What is the positively charged subatomic particle in an atom?
A proton
Electrons have _______________ mass.
very little
What determines reactivity (how an element reacts)?
How many valence electrons for a full outer shell?
8
What are the subatomic particles in the nucleus of an atom?
What is: neutrons and protons
The electrons travel around in an area of the atom called the _________ .
The electron cloud in electron orbital/shells/energy levels.
What do you call a column of elements on the periodic table that have similar chemical properties?
Group or Family
Where can you look if you forget information about the periodic table element squares?
The Key
In an atom, which has the least mass?
A: nucleus
B: proton
C: neutron
D: electron
What is: D, electrons
If an electron is added to a neutral atom (no charge), the total charge will become ________.
What is: Negative (ion)
As you go down a group or family on the period table what atomic properties increase?
Reactivity, atomic size, number of electron shells/orbitals/energy levels
Why do we study models of atoms instead of atoms directly?
What is: They are too small
What subatomic particle determines the identity of an element?
Protons
The nucleus of an atom has a _______ charge.
What is: positive
If you could add one more proton to Platinum (Pt atomic number 78) what element would you make?
Gold Au
What are electrons in the outermost shell called?
Valence Electrons