What makes the group 1 elements the most reactive metals? they have 8 valence electrons. they have 7 valence electrons. the have no valence electrons. they have 1 valence electron.

Which of the following did jj thompson discover about atoms? a)an atom has an internal structure. b) atoms are tiny indivisible particles. c)electrons orbit the nucleus of an atom. d) the nucleus of an atom contains protons and neutrons.

Melissa is interested in her family tree and how her family has changed over its many generations. melissa probably more closely resembles

The element that has the greatest electronegativity is