Electrons of an atom that have the highest energy level and are held most loosely
100
What does an electron dot diagram contain?
the symbol for the element surrounded by dots
100
What is a chemical bond?
the force of attraction that holds two atoms together
100
How can a chemical reaction in an atom occur?
When atoms transfer or share or share atoms between each other
200
What does the number of valence electrons in an atom determine?
Which properties that element would have
200
What do the dots in the electron dot diagram stand for?
The number of valence electrons
200
How many valence electrons are needed to make an atom of an element more stable?
8
200
What happens when a chemical reaction happens?
A new substance is created
300
True or False: The number of vlence electrons does not determine the ways the atom bonds with others
False
300
How many valence electrons can be in an atom?
Hint: It is a range of numbers.
1-8
300
Which of these events can happen when an atom reacts?
A: electrons are transferred between atoms
B: electrons are shared between atoms
C: the number of valence electrons increases to 8
D: the atom gives up loosely held valence electrons
E: all of the above
E
400
Which elements have eight valence electrons, therefore being the most unreactive?