Potassium and nickel are in the same row of the periodic table. What do these elements have in common? (1 point)

Question

• They have the same number of electron shells.
• They have the same number of valence electrons.
• They have similar physical properties.
• They have similar reactivity.

Answer 1

• They have the same number of electron shells.

Answer 2

Potassium and nickel are in the same row of the periodic table. What do these elements have in common? (1 point)
• They have the same number of electron shells.
• They have the same number of valence electrons.
• They have similar physical properties.
• They have similar reactivity.

Answer 3

• They have the same number of electron shells.

Answer 4

Why do elements that are in the same group of the periodic table share similar properties?
(1 point)
• They are all metals.
• They are all very reactive with other elements.
• They all have the same number of electrons in the outer shell.
• They all have the same atomic mass.

Answer 5

• They all have the same number of electrons in the outer shell.