CAIE Chemistry IGCSE: 3.1 Formulae Flashcards
Give the symbol that represents sodium:
Na represents sodium.
State the formula of sodium hydroxide:
NaOH is the formula of sodium hydroxide.
Define molecular formula:
The molecular formula of a compound is the actual number of atoms of each element present in
a compound.
A compound contains 3 carbon atoms and 8 hydrogen atoms. Write the chemical formula
of this compound:
The chemical formula is C3H8C_3H_8C3H8.
What is the formula for the compound shown in the diagram below?
The formula is C2H4Br2C_2H_4Br_2C2H4Br2.
What are the state symbols used in chemical equations?
● (g)(g)(g): Gas
● (aq)(aq)(aq): Aqueous
● (l)(l)(l): Liquid
● (s)(s)(s): Solid
Give examples of substances that are in the gaseous state at room temperature:
● Chlorine (Cl2(g)Cl_2(g)Cl2(g))
● Fluorine (F2(g)F_2(g)F2(g))
● Nitrogen (N2(g)N_2(g)N2(g))
Give the symbol that represents sodium:
Na represents sodium.
State the formula of sodium hydroxide:
NaOH is the formula of sodium hydroxide.
Define molecular formula:
The molecular formula of a compound is the actual number of atoms of each element present in
a compound.
A compound contains 3 carbon atoms and 8 hydrogen atoms. Write the chemical formula
of this compound:
The chemical formula is C3H8C_3H_8C3H8.
What is the formula for the compound shown in the diagram below?
The formula is C2H4Br2C_2H_4Br_2C2H4Br2.
What are the state symbols used in chemical equations?
● (g)(g)(g): Gas
● (aq)(aq)(aq): Aqueous
● (l)(l)(l): Liquid
● (s)(s)(s): Solid
Give examples of substances that are in the gaseous state at room temperature:
● Chlorine (Cl2(g)Cl_2(g)Cl2(g))
● Fluorine (F2(g)F_2(g)F2(g))
● Nitrogen (N2(g)N_2(g)N2(g))
