Number of neutrons = mass number - atomic number
= 99-29 = 70
Answer:
A molecular formulae________
will tell you how many and what
kinds of atoms are in a molecule, but not how they are
arranged.
On the periodic table everything to the right of the line is a non metal
Everything to the left is a metal. So the line crosses to the right is NM to left is M
The intermolecular force of attraction between non-polar molecules is called as dispersion force . Another trem for dispersion force is London dispersion force.
The correct answer is B) Double displacement.
This is because the Barium (Ba), which has a positive charge, got rearranged to bond with the carbonate (CO3), which has a negative charge. Also, the potassium (K), which has a positive charge, bonded with the chlorine (Cl), which has a negative charge.
It helps to remember that when there is a double replacement there are 4 elements/molecules in the reactants and 4 in the products that get rearranged.
Hope this helps!
