Me !

elements of the same period (horizontal row) behave similarly.
true
false

the elements of the periodic table are put in order of:
electrons
atomic mass
atomic number
neutrons

what is the charge of a magnesium ion?
2+
2-
3+
4+

which of the following pairs of atoms do not exhibit a covalent bond?
o and s
c and h
sr and f
f and h

the lewis structure of o2 has a double-bond.
true
false

the lewis structure of hcl has a double-bond.
true
false