Acompound formed between calcium, titanium, and oxygen crystallizes in the perovskite structure shown below. ca2+ cations (white circles) reside on the corners of the unit cell, the ti4+ cation (black circle) resides in the body center of the cubic cell, and o2- anions (gray circles) reside on each of the cell faces. what is the formula of the compound? write the elements in the order ca, ti, o.

Hey there!:

CaTiO3

*The corners are shared by 8 adjacent neighbors so only contribute 1/8 each,thus 1 Ca in the unit cell  .

*The center is totally encased in the unit cell, thus 1 Tiin the unit cell

.

 The faces are shared by 2 adjacent neighbors so onlycontribute 1/2 each

6 * 1/2, thus 3 O in the unit cell.

Hope that helps!

it is to be noted that an alpha particle is an helium nucleus. so it contains 2 protons 2 neutrons and has a mass number of 4. when alpha decay particles are ejected from the nucleus it gets transformed into an atom which has atomic number less than 2 and a mass number less than 4.

an equation that could represent alpha decay is radium 226 decay of alpha particle forms radon 222.

→

answer: -

reaction:

na + cl ⇌ nacl

balanced chemical equation:

na + 2cl ⇌ nacl2

sodium + clorine goes to form sodium chloride (table salt).

the product is nacl2.

and the reactants are na and cl.

(note: if you don’t know what ⇌ means, read below: -

⇌(double head arrow) means reversible reaction).