A compound is composed of two or more elements. Elements are composed of atoms.
In question 2, we can see that Helium gas is not a compound. A sample of Helium is made up of individual atoms of helium which are not chemically combined.
In question 3, the true statement about elements and compounds is that they are homologous in nature.
In question 4, the element mentioned among the list is iron. It is not chemically combined.
In question 5, The statement that describes an element is that it is the simplest substance. Elements have separate existence.
In question 6, the statements that correctly describes a compound ar;
- has a unique property that are different from the properties of it's individual elements
- composed of two atoms that bond together
In question 7, When hydrogen and oxygen gas combine, the result is water.
In question 8, a salt is made up of sodium and chlorine. This is our common table salt.
The correct matches for question 9 are;
In question 10, the symbol that does not depict an element is pz.
For question 11, the correct matches;
Aluminum: ELEMENT
Mercury: ELEMENT
Ferrous Sulfate: COMPOUND
Sucrose: COMPOUND
Carbon: ELEMENT
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