Match the Numbers with the letters so the letters define the numbers 1. Atomic mass
2. groups
3. periods
4. atomic number
5. valence
6. negligible
7. electron shell

A. the outermost electrons of an atom, or those on residing in the outermost energy shell of an atom or ion

B. horizontal rows of the periodic table

C. vertical columns of the periodic table

D. a group of electrons at a similar energy level

E. extremely small and unimportant

F. generally the sum of the protons and neutrons

G. the number of protons in every atom of an element

When a nucleus absorbs a neutron and then breaks apart, there are many products of the reaction. what is not a product of a nuclear fission reaction

The table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 9 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of tthe table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 9 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

How does the atmosphere to make earth livable? check all that apply. causes the seasons contains oxygen provides warmth creates important nutrients blocks harmful energy from the sun plz like !