Which of the following electronic structures belongs to a noble gas?
1s22s2
1s 22s22p4
1s22s22p63s23p6
1s22s22p2
1s22s22p 63s23p3
Correct answer is C
\(1s^22s^22p^63s^23p^6\)
Which is Argon = 2,8,8
The positive of an element in the Periodic Table is determined by
its density
its atomic radius
its relative atomic mass
the number of protons in its atom
the number of neutrons in its atom
Correct answer is D
No explanation has been provided for this answer.
1.0g
2.0g
6.0g
12.0g
24.0g
Correct answer is A
Mg\(_2\) + 2HCI\(_{(aq)}\) → MgCI\(_{2(g)}\) + H\(_{2(g)}\).
24g Mg reacts with 2g H
1g Mg = \(\frac{2}{24}\)g H
12g Mg = \(\frac{2}{24} \times 12\)g H
= 1g H.
When water is dropped on calcium carbide, the gaseous product is an
alkane
alkene
alkyne
alkanol
alkanal
Correct answer is C
No explanation has been provided for this answer.
How many faradays of electricity are required to liberate 9g aluminium? (AI = 27)
0.1
0.3
1.0
2.7
3.0
Correct answer is C
No explanation has been provided for this answer.