Elements in the same group have the same number of valence electrons labelled in Roman numerals.
Also, From left side-Right side of the periodic is in the following order - Alkali Metals, Alkali Earth Metals, Halogens then Noble gases in the Far right of the periodic table
Decay is a type of degradation reaction and thus is considered a first order reaction. thus the formula goes like this.
rate constant= 0.693/half life
so here...
rate constant= 0.693/1620 year^-1
Answer:
D.an indicator because if you read up on it,will show
Answer:
Sb and Te
Explanation:
there are on the stair step