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
Cell wall of which one of these is not made up of cellulose?
Anonymous Quiz
45%
Bacteria
29%
Hydriila
16%
Cactus
11%
Mango tree
Plant cells are stained using the stain called …………….
Anonymous Quiz
31%
Dna
50%
Safrain
13%
Cactus
6%
Tree
The movement of water molecules through a selectively permeable membrane is called …………….
Anonymous Quiz
56%
Osmosis
28%
Diffusion
12%
Absorption
3%
None
Virchow stated that ……………. arise from pre-existing cells.
Anonymous Quiz
54%
All cell
31%
All tissue
12%
All organ
3%
None
👍1
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
35%
13
42%
10
15%
16
8%
9
How many electrons are present in M-shell of an element with atomic number 20?
Anonymous Quiz
12%
5
58%
8
17%
12
14%
18