Question

sum of the atomic numbers of all elements in first group of modern periodic table is​

Answer 1

Answer:

Group 1A (or IA) of the periodic table are the alkali metals: hydrogen (H), lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr).

Answer 2

Answer:

Explanation:

H-1,Li-3,Na-11,K-19,Rb-37,Cs-55,Fr-87

1+3+11+19+37+55+87