All substances are composed of which type of matter
2 answers:
Answer: All substances are composed of elements.
Explanation: Matter is anything which has mass and occupies space.
The substances can be made up element alone like Helium (He).
They can be made up of molecules of elements also like hydrogen
They can also be made up of molecules of compounds like carbon dioxide
They can be made up of mixtures like salt solution in water.
Since all the mixtures, compounds and molecules consists of elements. Therefore, all the substances are composed of elements.
You might be interested in
Answer: a. +2, cation and magnesium ion .
b. -1, anion, chloride
c. -2, anion, oxide
d. +1. cation , potassium ion
Explanation:
When an atom accepts an electron negative charge is created on atom and is called as anion.
When atom loses an electron positive charge is created on atom and is called as cation.
Magnesium (Mg) with atomic number of 12 has electronic configuration of 2,8,2 and thus it can lose 2 electrons to form cation and becomes magnesium ion.
Chlorine (Cl) with atomic number of 17 has electronic configuration of 2,8,7 and thus it can gain 1 electron to form anion and becomes chloride.
Oxygen (O) with atomic number of 8 has electronic configuration of 2,6 and thus it can gain 2 electrons to form anion and becomes oxide.
Potassium (K) with atomic number of 19 has electronic configuration of 2,8,8,1 and thus it can lose 1 electron to form cation and becomes potassium ion.