Advertisements
Advertisements
Question
Five atoms are labeled A to E
|
Atoms |
Mass No |
Atomic No. |
|
A |
40 |
20 |
|
B |
19 |
9 |
|
C |
7 |
3 |
|
D |
16 |
8 |
|
E |
14 |
7 |
(a) Which one of these atoms:
(i) contains 7 protons
(ii) has electronic configuration 2,7
(b) Write down the formula in the compound formed between C and D
(c) Predict : (i) metals (ii) non-metals
Advertisements
Solution
(a)
Atom E contains 7 protons.
Atom B has an electronic configuration 2, 7.
(b) Atom C stands for7Li3, Atom D stands for 8O16.
Hence, compound formula is Li2O.
(c) Metals: A and C, Non-metals: B, D, E
APPEARS IN
RELATED QUESTIONS
Elements X, Y, and Z have atomic numbers 6, 9 and 12 respectively. Which one forms an anion?
Give electron dot diagram of the following:
Magnesium chloride
Give electron dot diagram of the following:
methane
What is an α (alpha) particle?
What do you understand by redox reactions?
Potassium (at No.19) and chlorine (at No.17) react to form a compound. Explain the formation of the compound on the basis of oxidizing agent.
Give the orbital diagram of the following:
Magnesium chloride
Give the orbital diagram of the following:
Hydrogen chloride
What is a chemical bond?
How many atoms of each kind are present in the following molecule:
Chlorine
