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Explain, in terms of electrons, why the three isotopes have the same chemical properties.
Atoms contain three different types of particle. These are electrons, neutrons and protons.
Which one of the three particles has a negative charge?
Atoms contain three different types of particle. These are electrons, neutrons and protons.
Which one of the three particles has the smallest mass?
Atoms are neutral because they contain equal numbers of
____ and ____
Isotopes are atoms with the same number of ____ but different numbers of ____ in the nucleus.
The atomic number of this atom is ____
The mass number of this atom is ____
The electronic configuration of this atom is ___
How many different elements are there in ammonium chloride? (1)
Identify the two gases in mixture A.
___ and ___
Identify the white solid B.
The particle furthest from the centre of each atom is
an electron - a neutron -
a nucleus - a proton
The particle present in atom Y but not in atom X is
an electron - a neutron -
a nucleus - a proton
Both atoms are neutral because they have the same number of
an electron - a neutron -
a nucleus - a proton
Magnesium oxide is also used as an antacid. It helps relieve indigestion by neutralising hydrochloric acid in the stomach.
Give the name and formula of the salt produced when magnesium oxide reacts with hydrochloric acid. (2)
