Answer:
The innermost electron shell of an atom can hold up to _____ electrons. ... What determines the types of chemical reactions that an atom participates in? the number of electrons in the outermost electron shell. Atoms with the same number of protons but with different electrical charges
Answer: one that has an unstable nucleus
Explanation:
D he predicted 3(?) new element that we're later discovered
Answer:
D. O
Explanation:
Oxygen is the closet to Fluorine out of the choices.