Home > Chemistry > Elements

What are the elements in the second third, fourth, and fifth periods that have the same number of highest-energy-level electrons as bariu.?

Answer 1

Cameron Andrews

Surely you have got a Periodic Table in front of you.....?

And barium is in Group 2; i.e. #Be#, #Mg#, #Ca#, #Sr#, #Ba#, and #Ra#........and all of these form #M^(2+)# ions.

By signing up, you agree to our Terms of Service and Privacy Policy

Answer 2

Wyatt Atkins

In the second period, elements with the same number of highest-energy-level electrons as barium (Ba) are: Calcium (Ca).

In the third period: Scandium (Sc), Yttrium (Y), and Lanthanum (La).

In the fourth period: Titanium (Ti), Zirconium (Zr), and Hafnium (Hf).

In the fifth period: Vanadium (V), Niobium (Nb), and Tantalum (Ta).

By signing up, you agree to our Terms of Service and Privacy Policy

Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.