Question

What is radioactivity?

a. Stable atomic nuclei decay over time into unstable nuclei.
b. Unstable atomic nuclei decay over time, releasing particles and energy.
c. Minerals or living organisms get contaminated.
d. Radio waves are present in or around a mineral.

Answer 1

The nucleus of a radioisotope is unstable. In an attempt to reach a more stable arrangement of its protons and neutrons, the nucleus will spontaneously decompose to form a different nucleus. If the number of neutrons changes in the process, a different isotopes is formed. If the number of protons changes in the process, then an atom of a different element is formed. This decomposition of the nucleus is referred to as radioactive decay

Answer 2

it is surly b. because the radio active waves are produced (like alpha, beta, gamma rays)
to lose energy to be in stable state. ok

Answer 3

A mineral is a natural solid that usually is

a. inorganic, with characteristic physical properties.
b. organic, with uncharacteristic physical properties.
c. organic, with characteristic physical properties.
d. inorganic, with uncharacteristic physical properties.

Answer 4

I think it may be c. because it is organic in nature and it is in stable state in constant temperature.....

Answer 5

Single-chain silicates are silicate crystalline structures in which tetrahedra form a

a. chain by sharing carbon atoms.
b. ring by sharing silicon atoms.
c. chain by sharing oxygen atoms.
d. ring by sharing oxygen atoms.

Answer 6

it may be d. because it share 1,2,3 or all 4 of its corner with oxygen

Answer 7

Chatoyancy is the property of a mineral that

a. enables it to float.
b. shows a cat’s-eye effect in reflected light.
c. enables it to glow in ultraviolet light.
d. shows a six-sided star in reflected light.

Answer 8

@ananata

Answer 9

according to my sense it may be B.

Answer 10

I think it's either b or d

Answer 11

I'm pretty sure its B

Answer 12

its just my view ok.
chato=cat