1:00
en
CR
19
atomic mass metals particle periods atoms quark ion electron chemical formula isotope compounds atomic number nonmetals proton valence electrons ionic bond covalent bonds neutron element metalloids
1
2
3
4
5
6
7
A
8
N
9
10
11
P
12
13
14
N
15
16
S
17
18
H
Across:
5.
8.
10.
11.
14.
15.
17.
18.
Down:
1.
2.
3.
4.
6.
7.
8.
9.
12.
13.
16.
© 2014
PuzzleFast.com
, Noncommercial Use Only
1
M
2
C
3
P
E
4
P
O
5
Q
U
6
A
R
K
A
T
E
V
T
R
A
R
7
E
A
8
I
S
O
T
O
P
E
T
L
I
L
L
O
M
I
L
O
E
E
N
9
M
10
I
O
N
I
C
B
O
N
D
C
N
E
C
L
I
S
T
T
11
P
R
O
T
O
N
E
D
R
B
A
U
12
A
S
O
O
13
A
L
M
T
14
N
O
N
M
E
T
A
L
S
B
O
D
O
15
E
L
E
M
E
16
N
T
S
M
R
S
E
I
U
17
C
O
M
P
O
U
N
D
S
T
M
R
18
C
H
E
M
I
C
A
L
F
O
R
M
U
L
A
O
S
N
S
Across:
5.
8.
10.
11.
14.
15.
17.
18.
Down:
1.
2.
3.
4.
6.
7.
8.
9.
12.
13.
16.
© 2014
PuzzleFast.com
, Noncommercial Use Only