UUL
C) A and B are
Statement (A): Based on properties the elements are classified into metals, non-metals and metalloids
Statement (B): Oxygen is an element
[ ]
Statement (C): Iron sulphide is a compound.
Statement (A): The substance which has mass and occupies space is called matter. [ ]
Statement (B): Elements and compounds come under matter.
Statement (C): The atomicity of ozone is 3.
Answers
Answer:
[a] The elements can be classified as metals, nonmetals, or metalloids. Metals are good conductors of heat and electricity, and are malleable (they can be hammered into sheets) and ductile (they can be drawn into wire).
[b] Oxygen is the chemical element with the symbol O and atomic number 8
[c] Iron(II) sulfide or ferrous sulfide is one of a family chemical compounds and minerals with the approximate formula FeS.
[a] Matter is anything that has mass and occupies space, while mass is a measure of “how much” matter a sample contains.
[b] Matter can be broken down into two categories: pure substances and mixtures. Pure substances are further broken down into elements and compounds
[c] Atomicity is the total number of atoms present in one molecule as we saw in oxygen, there are two atoms, so its atomicity will be 2. Similarly, we can determine the atomicity of ozone molecules. We know that one ozone molecule is composed of three atoms. Therefore, its atomicity will be three.