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प्रश्न
Select the correct answer from the choice in the bracket.
The positively charged particle of an atom.
पर्याय
electron
proton
neturon
उत्तर
proton
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संबंधित प्रश्न
Fill in the blank
A pure substance has definite.................. and constant ..............
Name the substance you will add to speed up sedimentation.
Give two examples of the following.
Non-metals which are lustrous
Give reason: Argon is filled in electric bulbs.
Answer the following question:
When iron is mixed with sulphur at room temperature, it does not form a compound. Why?
Fill in the blank
A liquid non-metal is _______.
Match the Columns:
| Column A | Column B | ||
| (a) | Metals | (i) | Non-Reactive |
| (b) | Molecules | (ii) | Brittle |
| (c) | Non-Metals | (iii) | Lustrous |
| (d) | Noble Gases | (iv) | Smallest unit of Compound |
Tick (√) the correct alternative from the choice given for the following statement
A gaseous non-metal.
Classify substances into pure and impure substances in the form of a chart or tabulation.
Differentiate between the terms –
elements, compounds & mixtures.
Complete the statement given below by filling in the blanks with the correct words.
From the elements – He, Br, Pt, and O; the element which is metallic is ____, an inert element is ____, forms a triatomic molecule is ____, is liquid at room temperature is_ ___.
Select the correct answer from the choice given below.
The unreactive non-metallic element
Write the names of elements from the following symbol:
Ir
Select the correct answer to the statement given below:
The chemical name for dinitrogen oxide [N20].
‘The modern periodic table consists of elements arranged according to their increasing atomic numbers’. With reference to elements with atomic numbers 1 to 20 only in the periodic table – differentiate them into – metallic elements, metalloids, non-metals & noble gases.
Elements are broadly classified into metals and non-metals. State six general differences in the physical properties of metals and non-metals. State two metals and two non-metals which contradict with the general physical properties – giving reasons. State one difference in property between metalloids and noble gases.
Elements are the______ form of pure substances.
Name the two elements which are derived from the country.
