atomic structure

Question 1

mass number

Answer 1

number of protons and neutrons in an atom

Question 2

relative atomic mass

Answer 2

the mass of an atom of the element compared to 1/12th of mass of one atom of carbon-12

Question 3

isotopes

Answer 3

atoms of the same element with same proton number but different neutron number

Question 4

orbitals

Answer 4

the 3D space around the nucleus where there is maximum probability of locating the electron

Question 5

first ionization energy

Answer 5

energy required to remove outermost electron from each atom in one mole of gaseous atoms

Question 6

second ionization energy

Answer 6

energy required to remove the outermost electron from each +1 ion in one mole of ions

Question 7

successive ionization energy

Answer 7

energy required to remove all the electrons one by ine from an atom

Question 8

first electron affinity

Answer 8

energy released when an electron is added to each atom on one mole of gaseous atoms

Question 9

electro negativity

Answer 9

the ability of the atom to attract electrons in a covalent bond

Question 10

atomic number

Answer 10

number of protons in an atom

Question 11

relative molecular mass

Answer 11

the weighted average mass of a molecule of a compound compared with 1/12th the mass of an atom of carbon 12

Question 12

relative formula mass

Answer 12

the average mass of the formula unit of a compound compared with 1/12th the mass of an atom of carbon 12

Question 13

a mole

Answer 13

the amount of substance that contains as many single particles as there are atoms in exactly 12g of the carbon 12 isotope

Question 14

molar mass

Answer 14

the mass of one mole of a substance

Question 15

what is non polar?

Answer 15

atoms are the same and have similar electronegativities and electrons are shared equally between both atoms

Question 16

what is polar bonds?

Answer 16

electrons in the bond are shared unequally making a polar bond and bond atoms are different, each has a different electronegativity