Protons and Electrons

Question 1

How can an element be identified?

Answer 1

By its atomic number

Question 2

What is an elements atomic number?

Answer 2

The number of protons in its nucleus.

Question 3

How are electrons arranged in in the electron cloud?

Answer 3

By energy levels

~There are a certain number of electrons that each energy level can hold

Question 4

Electrons located in the outermost shell….

Answer 4

are called “valence electrons” and have the highest energy

Question 5

Valence Electrons

Answer 5

~determine chemical properties of elements

~determine how valence electrons are shared or traded with other elements to create new molecules

Question 6

Reactivity of an atom (metals an nonmetals)

Answer 6

How easily and readily that atoms valence electrons interact with valence electrons of other atoms
~Atoms of metals transfer electrons to nonmetals
~Atoms of nonmetals gain or share electrons when they react

Question 7

Charged Atoms

Answer 7

Ions

Question 8

What causes an atoms electrical charge to change?

Answer 8

The loss or gain of valence electrons