Question



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 protons

number of orbitals
number of orbitals

number of neutrons
number of neutrons

number of valence electrons
number of valence electrons
Answer
Which element has six valence electrons?
Answer
Which statement correctly compares the number of protons and electrons in atoms of rubidium (Rb) and calcium (Ca)?

Answer
Which statement correctly compares the number of protons and electrons in atoms of rubidium (Rb) and calcium (Ca)?

(1 point)
Responses

Rubidium has fewer protons and more electrons than calcium.
Rubidium has fewer protons and more electrons than calcium.

Rubidium has more protons and more electrons than calcium.
Rubidium has more protons and more electrons than calcium.

Rubidium has more protons and fewer electrons than calcium.
Rubidium has more protons and fewer electrons than calcium.

Rubidium has fewer protons and fewer electrons than calcium.
Answer
Potassium’s atomic number is 19, and its atomic mass is approximately 39. How many neutrons does potassium have?(1 point)
Answer
Which element does not have the same number of electrons in its outermost shell as the other elements in its group?(1 point)
Responses

helium (He)
helium (He)

bromine (Br)
bromine (Br)

boron (B)
boron (B)

hydrogen (H)
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