2.1 Study Guide Flashcards
Bio ll
1
Q
What are valence electrons?
A
electrons in the very outer shell of an atom
2
Q
What is one job of a valence electron?
A
to participate in chemical reactions
3
Q
What is another job of a valence electron?
A
to stabilize atoms
4
Q
How do we tell how many valence electrons an element has?
A
Read the periodic table from left to right, each column is +1 valence electron. Exclude the transition metals.
5
Q
What do valence electrons and isotopes have in common?
A
They both stabilize atoms
6
Q
What is an isotope determined by?
A
The mass
7
Q
What do isotopes consist of?
A
same element with different number of electrons
8
Q
True/ false: some isotopes are nuclear
A
true
9
Q
What do same protons equal
A
same reaction
10
Q
Can isotopes change the charge of an atom?
A
yes
