2 atoms, ions and compounds

Question 1

anion

Answer 1

negatively charged ion with more electrons than protons

Question 2

atomic number, Z

Answer 2

number of protons in the nucleus of an atom
(proton number)

Question 3

binary compound

Answer 3

compound containing two elements only

Question 4

cation

Answer 4

positively charged ion with fewer electrons than protons

Question 5

ion

Answer 5

positively or negatively charged atom or a group of atoms where the number of electrons is different from the number of protons

Question 6

isotope

Answer 6

atoms of the same element with different numbers of neutrons and different masses but the same number of protons

Question 7

mass number, A

Answer 7

sum of the number of protons and neutrons in the nucleus
(nucleon number)

Question 8

polyatomic ion

Answer 8

ion containing more than one atom

Question 9

ammonium

Answer 9

NH4+

Question 10

hydroxide

Answer 10

OH-

Question 11

nitrate

Answer 11

NO3-

Question 12

nitrite

Answer 12

NO2-

Question 13

hydrogen carbonate

Answer 13

HCO3-

Question 14

manganate (VII)
(permanganate)

Answer 14

MnO4-

Question 15

carbonate

Answer 15

CO3,2-

Question 16

sulfate

Answer 16

SO4,2-

Question 17

sulfite

Answer 17

SO3,2-

Question 18

dichromate(VI)

Answer 18

Cr2O7,2-

Question 19

phosphate

Answer 19

PO4,3-

Question 20

proton number

Answer 20

number of protons in the nucleus of an atom
(atomic number)

Question 21

relative atomic mass, Ar

Answer 21

weighted mean mass of an atom of an element compared with 1/12th of the mass of an atom if carbon-12

Question 22

relative isotopic mass

Answer 22

mass of an isotope compared with 1/12th of the mass of an atom of carbon-12

Question 23

proton

Answer 23

p+ 1+ 1

Question 24

neutron

Answer 24

n 0 1

Question 25

electron

Answer 25

e- 1- 1/1836

Question 26

diatomic molecules

Answer 26

H2, N2, O2, F2, Cl2, Br2, I2, P4, S8