The mass of a neutron is 1.67493 ×
× 10–27 kg. Enter this value in the answer blank.

In which block of the periodic table is uranium (u) found? s blockd blockp blockf block

An atomic nucleus is composed ofa)protons.b)protons and neutrons.c)protons and electrons.d)protons, neutrons, and electrons.

Of the following elements, which is the least reactive? a. c b. h c. li d. he