The combining power of an element is known as its …………….
Anonymous Quiz
52%
Valency
28%
Atomic energy
9%
Atomic number
10%
Atomic mass
How many times an atom of sulphur is heavier than an atom of carbon?
Anonymous Quiz
38%
8/4 times
33%
8/3times
14%
8/2 times
16%
8times
🤯1
The relative molecular mass of Na2S2O3.5H2O is
Anonymous Quiz
41%
250 amu
44%
248 amu
12%
246amu
3%
234amu
👍1
What mass of carbon dioxide (CO2) will contain 3.011 × 1023 molecules?
Anonymous Quiz
22%
11.0 g
43%
22.0g
21%
2.8g
14%
44.0 g
The ion of an element has 3 positive charges. Mass number of the atom is 27 and the number of neutrons is 14. What is the number of electrons in the ion?
Anonymous Quiz
31%
13
44%
10
19%
14
6%
16
How many electrons are present in M-shell of an element with atomic number 20?
Anonymous Quiz
11%
5
55%
8
16%
12
18%
18
👍1
Neon and chlorine have atomic numbers 10 and 17 respectively. Their valencies will be ………….. and ……………. respectively.
Anonymous Quiz
14%
1,0
59%
0,1
24%
2,1
4%
1,2
The maximum number of electrons in a shell is given by ……………..
Anonymous Quiz
40%
2n
20%
n
35%
2n^2
6%
None
Which of the following are covered by a single membrane?
Anonymous Quiz
39%
Mitochondria
43%
Vacoule
15%
Lysosome
4%
None