Chemistry

Calcium atom ionizes by?

A. gaining two electrons B. losing two electrons C. sharing two electrons D. gaining two protons Correct Answer: Option B…

5 years ago

Two radioactive elements Q and S have half-life periods of 10 hours and 20 hours respectively. Therefore?

A. S decays faster than Q B. Q is twice as stable as S C. Q emits fewer particles than…

5 years ago

Which of the orbitals 4s, 4p, 4d and 4f has the lowest energy?

A. 4f B. 4p C. 4d D. 4s Correct Answer: Option D - 4s

5 years ago

What is the electronic configuration of an element represented as 19 9X?

A. 1s² 2s² 2p5 B. 1s² 2s² 3s² 3p³ C. 1s² 2s² 2p³ 3s² D. 1s² 2s² 2p6 3s² 3p6…

5 years ago

Which of the following atoms contains the highest number of electrons in the outermost shell?

A. 8O B. 10Ne C. 15P D. 19K Correct Answer: Option B - 10Ne

5 years ago

Given that the electronic configuration of an element X is 1s² 2s² 2p6 3s² 3p4, it can be deduced that X?

A. belongs to group VI in the Periodic Table B. belongs to periodic Table C. contains 3 unpaired electrons in…

6 years ago

Allotropes of an element differ in their?

A. physical properties B. chemical properties C. mass numbers D. electronic configuration Correct Answer: Option A A. physical properties

6 years ago

A plastic that cannot be softened by heat is described as?

A. thermosetting B. non-biodegradable C. thermoplastic D. malleable Correct Answer: Option A A. thermosetting

6 years ago