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3241004551 [841]
3 years ago
8

Which phrases describe radioactive elements? Check all that apply.

Biology
2 answers:
svp [43]3 years ago
5 0

A radioactive element is an element which is subject to spontaneous degeneration of its nucleus followed by the emission of alpha, beta and gamma particles. All elements with atomic numbers greater than 83 are radioactive.

The given phrases that describe radioactive elements are-

They have a consistent number of particles - the particles are alpha, beta and gamma particles.

They have a half-life that determines their rate of decay.

Explanation for other options:

Not all elements occur in nature. Radioactive decay rates may not be constant as the decay happens when a radioactive substance emits a particle. It is not possible to predict exactly when a given atom of a substance will emit a particular particle. When the radioactive element release energy and particles, it decays.

LekaFEV [45]3 years ago
3 0

A,B,D because i just took the test

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Answer:

Hydrogen, Lithium, Aluminum, Argon, Nickel, Iodine, Gold, Mercury

 

Explanation:

Hydrogen has 1 proton.

Lithium has 3 protons.

Aluminum has 13 protons.

Argon has 18 protons.

Nickel has 28 protons.

Iodine has 53 protons.

Gold has 79 protons.

Mercury has 80 protons.

Hope this helps.

3 0
2 years ago
How many elements have currently been discovered​
Alex

Answer:

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Explanation:

6 0
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Answer:

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Explanation:

The question is incomplete, here is the full question:

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5 0
3 years ago
Photosynthesis and Cellular Respiration: Are They Similar?
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Answer:

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Explanation:

7 0
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