Which of the following 3 statements are true? A Valence electrons are only found in the nucleus of an atom
B Electrons are negative and Protons are positive
C Protons and electrons are both negative
D
Valence electrons are only found in the outer most shell of an atom
E
Protons and electrons are found in the nucleus
F
Protons and neutrons are found in the nucleus and electrons are found in the cloud
G
Protons and neutrons are both positive

B,D,F

Explanation:

Protons are positive, electrons are negative and neutrons have no charge.

The protons and neutrons are found in the nucleus and the electrons are found in the electron shells/cloud

Valence shells mean the outermost shell. therefore valence electrons would be on the valence shell ( The outermost shell).

alkaline metals are lithium, sodium, rubidium, potassium, cesium and francium.

alkali metals have electronegativity from 0.7 to 1, lowest in periodic table of elements, which means that alkali metals (i group in periodic table) has positive oxidation number in compounds.

electronegativity is a chemical property that describes the tendency of an atom to attract a shared pair of electrons towards itself.

alkaline metals (far left in main group) have lowest ionizations energy and easy remove valence electrons,

for example, potassium is the alkali metal and has a single valence electron in the outer electron shell.

electron configuration of potassium is: ₁₉k 1s²2s²2p⁶3s²3p⁶4s¹.

they can not exist alone in nature, because they are very reactive.