Chemistry - C1 AQA quick quiz

What is the general name for the particle that all substances are made from?

Substances that contain only one type of [blank_start]atom[blank_end] are called [blank_start]elements[blank_end]. Byt when atoms of different elements join together, they form [blank_start]compounds[blank_end].

Atoms are made of a tiny nucleus, that is surrounded by a shell of elements.

The state symbol used for solids is [blank_start](s)[blank_end]. The state symbol used for [blank_start]liquids[blank_end] is (l). The state symbol used for gasses is ([blank_start]g[blank_end]). The state symbol used for [blank_start]aqueous[blank_end] solutions is ([blank_start]aq[blank_end]).

If a substance consists of atoms that all have the same number of protons and electrons,l but a different number of neutrons. Is it still an element?

An isotope is an element that has a different number of [blank_start]neutrons[blank_end], but the same number of [blank_start]Protons[blank_end]. So isotopes have [blank_start]a different[blank_end] mass, but [blank_start]the same[blank_end] charge. Many elements can exist as a different number of isotopes, relative [blank_start]atomic[blank_end] mass [blank_start](Ar)[blank_end] is used instead of mass number. This is [blank_start]an average[blank_end] mass, taking into account the all the different masses of the different [blank_start]isotopes[blank_end].

When different atoms join together, they form a compound.

Name the compound CaCl(2)

When a metal and [blank_start]a non-metal[blank_end] react together, it is called [blank_start]ionic bonding[blank_end]. The metal atoms lose electrons, which gives the atom a [blank_start]positive[blank_end] charge, whereas the [blank_start]non-metals[blank_end] gain electrons, which gives the electron a [blank_start]negative[blank_end] charge. The opposite charges are [blank_start]attracted[blank_end] to each other.

Compounds can't be represented as formulas.