Within an atom, electrons a. are in motion inside the nucleus. b. are in motion outside the nucleus. c. are inside the nucleus and are motionless. d. are outside the nucleus and are motionless

The mass of a neutron is equal to the mass of a proton plus the mass of an electron. true or false false true

He table below gives the atomic mass and relative abundance values for the three isotopes of element m. relative abundance (%) atomic mass (amu) 78.99 23.9850 10.00 24.9858 11.01 25.9826 what is the average atomic mass (in amu) of element m? 2.86 5.36 24.30 24.98

Identify the correct mole ratio for each substance. sodium chloride (nacl) na: cl = 1: ammonium nitrate (nhno) h: o = 4: