Counting Numbers Of Atoms Flashcards
1
Q
What patterns are there on the periodic table of valence electrons?
A
-the number of valence electrons increases by one going left to right (1,8)
- the number of valence electrons applies to the column they are overtime (column 1=1ve, column 13=3ve (because it skips over the middle of periodic table)
2
Q
Why is knowing by the number of valence electrons an element has important?
A
-tells how many ve the element with gain, lose or share in order to bond
-tells how many ve the element will gain, lose or share in order to have a full shell
3
Q
How many oxygen atoms are in H2O
A
1
4
Q
How many hydrogen atoms in C6H12O6
A
12
5
Q
In 2CO2 how many oxygen atoms are there?
A
4
6
Q
- How many total atyards me are in 3H2SO4
A
21
7
Q
How we many sulfur atoms are in 4Al2(SO4)3
A
12
