Review on Atomic Structure and Periodic table 2021

The sum of protons and neutrons in an isotope is the

Halogens are group

Which neutral elements has 15 electrons?

What is the name of the family with a full outer energy level? (8 valence electrons)

For an atom to be neutral, what must be true?

The number 96 in molybdenum-96 represents the

Which element is a transition element?

The family that has 2 valence electrons is the

Which element is in Period 4 and Group 17?

How many protons are found in a neutral of of the image below?

Which subatomic particle is not found in the nucleus?

This group will form a -1 ion.

Do these symbols represent isotopes, ions, or different elements: ⁹³₄₁Nb and ⁹⁵₄₁Nb ?

What is the name of the family that includes groups 3-12?

How is the periodic table arranged?

How many neutrons are in a typical atom of Cd -112 (atomic # is 48)?

I do not form ions and have 5 energy levels, what element am I?

Which Noble Gas is found in the third period?

The pair of elements with the most similar chemical properties are ?

How many electrons are in Sr⁺²?

Adding 1 electron will form a __ ion.

What is the symbol notation for an atom with 9 protons and 10 neutrons?

What element has five valence electrons and 2 energy levels?