Which of the following has the greatest number of particles a) 1 mole of na b)22.990g of na c) 1 mole of be d) 9.012 g of be e) all are the same

E) all are the same

The question requires we identify the amount of an element with the greatest number of particles.

In this case;

Choice A

1 mole of Na

1 mole of Na contains 6.022 × 10^23 atoms

Choice B

22.990 g of Na

The molar mass of sodium is 22.99 g/mol

Therefore, 22.990 g of Na contains 6.022 × 10^23 atoms

Choice C

1 mole of Be

1 mole of Be contains 6.022 × 10^23 atoms

Choice D

9.012 g of Be

But, the molar mass of Be is 9.012 g

Thus; 9.012 g of Be contains 6.022 × 10^23 atoms

increase masses, decrease separation