<span>n = 5 shell=50</span>
<span>n = 2 shell=8</span>
<span>n = 2, l = 0 subshell=2</span>
<span>n = 2, l = 1 subshell=6</span>
<span><span>3d subshell=</span>10</span>
<span>2s subshell=2</span>
<span><span>5f subshell=14</span></span><span><span> sorry if I'm late I just did this! hope it helps..</span></span>
A is the answer im pretty sure
Ra-226 will go through α decay which means the nucleus of radium-226 will emit a α particle. α particle consists of 2 protons and 2 neutrons. So it will become Rn-222.
1 mole of NaCl contains 6.022×10^23 particles
∴. 922 moles of NaCl contains.... (multiplication of the 2 numbers)