Your qiuestion cannot be answered as stated. Please explain and submit again.
Because they are both multiples of two, so when they're added, the sum must be another multiple of two. (One group of twos plus another group of twos must be a new group of twos, just like one group of cows plus another group of cows must be a new group of cows.)
Two atoms of group IA (e.g., sodium) and one atom of group IIA (e.g., calcium) are needed to react with a carbonate (CO3^2-) because group I metals form +1 ions (like Na^+), which can bond with one carbonate ion, while group II metals form +2 ions (like Ca^2+), which can bond with two carbonate ions. This completes the ionic bonding requirements of the elements involved.
PLUS Markets Group was created in 2005.
Two atoms of a Group 17 element would be needed to react with one atom of a Group 2 element because Group 17 elements have a valency of 1, while Group 2 elements have a valency of 2. This means that for the two elements to form a stable compound, they need to share electrons in a 1:2 ratio.
1008
Any two persons can get married. So yes.
normally they have "o" plus or negative.
18907
Security Group
No. The child will be either group A or group B, but not group O. This is because the father can donate only a group A gene or a group B gene, so since group A and group B are dominant over group O, the child could not have group O blood.
branch-based group including the crown group plus the stem group.
of course.