Chemistry_IGCSE_Review Flashcards
1
Q
Name the process of converting a solid directly into a gas without passing through the liquid state.
A
Sublimation.
2
Q
Define a compound in chemistry.
A
A compound is a substance composed of two or more different elements chemically bonded together in a fixed ratio.
3
Q
What is the chemical formula for water?
A
H2O
4
Q
: What is the chemical symbol for gold?
A
Au
5
Q
Name all the noble gases.
A
Helium (He), Neon (Ne), Argon (Ar), Krypton (Kr), Xenon (Xe), Radon (Rn)
6
Q
Define a mixture in chemistry.
A
A mixture is a combination of two or more substances in which each substance retains its chemical properties. Mixtures can be separated by physical means
7
Q
What is the chemical symbol for sodium?
A
Na
