11. What is the mass number
of an element if its atom
contains 10 protons, 10
electron, and 12 neutrons?
A 12
C20
D. 32

There are main groups in the modern periodic table of elements

Aweight lifter raises a 1600 n barbell to a height of 2.0 meters. how much work was done? w = fd a) 30 joules b) 3000 joules c) 320 joules d) 3200 joules

What is bromine+calcium iodide--> calcium bromide +iodine balanced