Unit 1 - Elements & compounds
metha
1. An element is a pure substance which cannot be broken down by physical or
(protons / neut
[neutron / nucleus), with positively charged
an inert el
Elements,
Q.1 Complete the statements given below by filling in the blank with the correct word/s.
(molecule / atom / ion]
2. The basic unit of an element is a /an
3. Atom contains
- [silver/copper/carbon] has the symbol derived from its Latin name 'argente
4. Element
5. From the elements - He, Br, P& O; the element which is metallic is
is liquid at room temperature is
is
forms a triatomic molecule is
6. From the elements nitrogen, chlorine, bromine, the element present in the atmosphere is
Q.2 Match the statements in List I - 1 to 10 with their correct answers in List Il - A to J.
1. Fluorine & chlorine
B: Boron
2. A diatomic molecule
3. A molecule containing the elements hydrogen and oxygen
4. A metalloid - showing properties of both metals & non-metals
5. The term used for the substances which take part in the chemical reaction
6. The term which represents a substance by means of symbols
F: Water
7. The term used for substances formed as a result of a chemical reaction G: Nitric oxide
8. A compound containing one atom of zinc & two atoms of chlorine
H: Products 7
9. The chemical name for nitrogen monoxide
1: Phosphoru
10. A polyatomic molecule
J: Zinc chlori
A: Nitrogen
C: Reactants
D: Chemical for
E: Halogens
Answers
Answered by
21
Answer:
Q1.
2)atom
3)silver
4) question is incomplete
5)Br
6)nitrogen
Q2.
1. E) Halogens
2.
3. F) Water
4. B) boron
5. C) reactants
6.
7. H) Products
8. J) Zinc chloride
9. G) Nitric oxide
10. Phosphorus
The question 2 was not proper but I tried to answer some of them.
Answered by
5
Answer:
Question 1.
2) atom
3) silver
4) They are also called as semimetals.
5) Br
6) nitrogen
Question 2.
1. E) Halogens
2. (O2) Oxygen
3. F) Water
4. B) boron
5. C) reactants
6. F) (Aq) Aqueous
7. H) Products
8. J) Zinc chloride
9. G) Nitric oxide
10. Phosphorus
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