Lots o points and brainliest To find the atomic mass of an element that is included on a periodic table, what must be found first? The number of protons in that element.
The average mass of all the isotopes.
The number of electrons in that element.
The number of neutrons in that element.

Which element in the third period would you expect to have the larger atomic radius, sodium (na) or sulfur (s)? a. sodium, because it has a higher effective nuclear charge attracting electrons in fewer energy levels. b. sodium, because it has fewer protons attracting electrons in the same energy levels. c. sulfur, because it has more protons attracting electrons in more energy levels. d. sulfur, because it has a higher effective nuclear charge attracting electrons in the same energy levels.

Acurium-245 nucleus is hit with a neutron and changes as shown by the equation. complete the equation by filling in the missing parts. 52

What is the relationship of air masses and the temperature of oceans?