Advertisements
Advertisements
प्रश्न
Elements A, B and C have atomic number 17, 19 and 10 respectively.
State which one is a non-metal.
Advertisements
उत्तर
Electronic configuration of element A = (2, 8, 7) at atomic no. 17
∴ Element A has 7 electrons in its outermost shell it is a non-metal.
APPEARS IN
संबंधित प्रश्न
A Compound 'X' consists of only molecules. Hence 'X' will have
How does the Modern atomic theory contradict and correlate with Dalton's atomic theory?
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
Name the following:
An element having valency 'zero'
\[\ce{^24_12Mg}\] and \[\ce{^26_12Mg}\] are symbols of isotopes of magnesium.
(a) Compare the atoms of these isotopes with respect to :
i. the composition of their nuclei
ii. their electronic configurations
(b) Give reasons why the two isotopes of magnesium have different mass numbers.
Give the orbital diagram of the following:
Hydrogen chloride
State the type of bonding in the following molecules.
Water,
Identify the following reaction as either oxidation or reduction:
Zn → Zn2+ + 2e-
How many atoms of each kind are present in the following molecule:
Chlorine
How many electrons are required or released by each atom in carbon tetrachloride to attain the nearest noble gas configuration?
