Which property do the elements in each column of the representative elements series of the periodic table have in common
number of protons
number of orbitals
number of neutrons
number of valence electrons
Which element has six valence electrons
oxygen (O)
phosphorus (P)
carbon (C)
lead (Pb)
Which statement correctly compares the number of protons and electrons in atoms of rubidium (Rb) and calcium (Ca)
Rubidium has fewer protons and more electrons than calcium.
Rubidium has more protons and fewer electrons than calcium.
Rubidium has fewer protons and fewer electrons than calcium.
Rubidium has more protons and more electrons than calcium.
Potassium’s atomic number is 19, and its atomic mass is approximately 39. How many neutrons does potassium have
58
39
20
19
Which element does not have the same number of electrons in its outermost shell as the other elements in its group
hydrogen (H)
bromine (Br)
boron (B)
helium (He)
1 answer