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Harrizon [31]
2 years ago
5

Questions and answers about isotopes grade 8 I need this for a PowerPoint exam projects

Chemistry
1 answer:
DanielleElmas [232]2 years ago
3 0

Answer:

Question: A patient is diagnosed with a damage in the thyroid gland.

Which isotope is used to treat the patient?

Option:

A. Copper-64

B. Cobalt-60

C. Carbon-14

D. Iodine-131

Correct answer : D. Iodine-131

Question: Give the definition of isotopes.

Answer : Isotopes is the atoms of elements with the same proton number but different number of neutrons.

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Question 4 of 10
fredd [130]

Answer:

c

Explanation:

because of the law of gravity

6 0
3 years ago
Which material is found in asteroids?
Ganezh [65]

Answer:

Asteroids are made of rock, metals, and other elements. Some even contain water. Asteroids that are mostly stone sometimes are more likely to lose piles of rubble. Asteroids that are mostly iron are more rock-solid.

Explanation:

3 0
3 years ago
Read 2 more answers
The half-life of 232-Th is 1.4 x 10^10 years.if there were 25.0 grams of thr sample left after 2.8 x 10^10 years,how many grams
EleoNora [17]

<span>1.    </span>For this problem, we use the formula for radioactive decay which is expressed as follows:<span>

An = Aoe^-kt

where An is the amount left after time t, Ao is the initial amount and k is a constant. 

We calculate as follows:

An = Aoe^-kt
0.5 = e^-k(1.4x10^10)
k = 4.95x10^-11

An = Aoe^-kt
25 = Aoe^-</span>4.95x10^-11<span>(2.8x10^10)
Ao = 100 g</span>

7 0
4 years ago
An atom has 9 protons and 7 electrons. What is its overall charge?
tresset_1 [31]

Answer:

Positive

Explanation:

If an atom has more protons than electrons, its overall charge will be positive. Protons have a positive charge, electrons have a negative charge.

3 0
3 years ago
Difference between electro positive and electronegative radical
marysya [2.9K]

Answer:

<h2>Here's your answer</h2>

Explanation:

The key difference between electropositive and electronegative radicals is that electropositive radicals are radical compounds having the capacity to electrons and carry a positive charge whereas electronegative radicals are radical compounds having the capacity to gain electrons and carry a negative charge.

I hope it's helpful for you

5 0
3 years ago
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