Chemistry

Multiple choice

100

the total number of protons and neutrons (together known as nucleons)

Mass number

200

either a proton or a neutron

Nucleon

300

the number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table.

Atomic number

400

6.02214076 × 1023.

Avogadro's number

500

the mass in grams of one mole of a substance.

Molar mass

Multiple choice

100

a stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids.

Electrons

200

the number written in front of atoms, ion and molecules in a chemical reaction to balance the number of each element on both the reactant and product sides of the equation.

Stoichiometric

300

A _______ of something means you have 602,214,076,000,000,000,000,000 of that thing.

(6.02214076×10²³ )

The mole

400

An atom or molecule with a net electric charge due to the loss or gain of one or more electrons.

Ions

500

a positively charged ion 

Cation 

random

100

a negatively charged ion

Anion

200

ZnO

Zinc oxide

300

(NH4)2CO3

Ammonium carbonate

400

molar mass of carbon

12.011 u

500

molar mass of oxygen

15.999 u

Ionic compounds

100

K2Cr2O7

Potassium dichromate

200

Pb3(PO4)2

Lead phosphate

300

Mg(MnO4)2

Magnesium permanganate

400

Al2(SO4)3

Aluminium sulfate

500

Na₂SiO₃

Sodium metasilicate

Balance this equation

100

__K + __I₂ --> __KI

_2_K + _1_I₂ --> _2_KI

200

__Na + __MgF₂ --> __NaF + __Mg

_2_Na + _1_MgF₂ --> _2_NaF + _1_Mg

300

__BaCl₂ + __Na₂SO₄ --> __NaCl + __BaSO₄

_1_BaCl₂ + _1_Na₂SO₄ --> _2_NaCl + _1_BaSO₄

400

__LiCl + __Mg(NO₃)₂ --> __LiNO₃ + __MgCl₂

_2_LiCl + _1_Mg(NO₃)₂ --> _2_LiNO₃ + _1_MgCl₂

500

__Fe +__O₂ --> __Fe₂O₃

_4_Fe +_3_O₂ --> _2_Fe₂O₃