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vazorg [7]
2 years ago
9

Use the drop-down menus to complete each statement.

Chemistry
1 answer:
slavikrds [6]2 years ago
8 0
Question 1: A material that causes a wave to bounce off it is called the. Answer : Reflection

Question 2: A material that takes in a wave when the wave hits is called the. Answer: Absorber
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7. Suppose each of these isotopes emits a beta particle. Give the iso-
Volgvan

In a beta emission, the mass number of the daughter nucleus remains unchanged while the atomic number of the daughter nucleus increases by one unit. The following are isotopes produced when the following undergo beta emission;

1) potassium-42  ------> Ca - 42

2) iodine-131 ------------> Xe - 131

3)  iron-52 ---------------> Co - 52

4)  sodium-24 -----------> Mg -24

The daughter nucleus formed after beta emission is found one place after its parent in the periodic table.

Regarding the stability of the daughter nuclei, a nucleus is unstable if the neutron-proton ratio is less than 1 or greater than 1.5.

Hence, the following daughter nuclei are stable; Ca - 42, Xe - 131, Mg -24.

Learn more: brainly.com/question/1371390

7 0
3 years ago
450 nanometers to meters
lys-0071 [83]

Answer: 4.5 x 10e-7

Explanation: 450 x 1e+9 = correct answer

Multiply amount of nanometers by 1e+9 to get the approximate result in meters.

4 0
3 years ago
How many neutrons does an element have if its atomic number is 42 and its mass number is 155? (10 Points)
sertanlavr [38]

The Element would have 197 neutrons

8 0
3 years ago
A neutral atom of gold has the same number of electrons and what?
liraira [26]
Atomic mass!!! the electrons and atomic mass will always be the same most the time
6 0
3 years ago
How many moles of nitrogen are formed when 58.6 g of KNO3 decomposes according to the following reaction? The molar mass of KNO3
geniusboy [140]
Hope this helps you!

8 0
3 years ago
Read 2 more answers
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