Please please help me i’m so confused! i will give brainleiest answer

Chemistry

1 answer:

pochemuha3 years ago

7 0

Answer:

PLEASE MARK AS BRAINLIEST!!

Explanation:

Calcium has an atomic number of 20 and an atomic mass of 40

The mass number of an isotope is the sum of the number of protons and neutrons in the atomic nucleus. The atomic number is the number of protons. The calcium-40 isotope has a mass number of 40 , and an atomic number of 20 , therefore it has 20 protons.

You might be interested in

Calculate the wavelength of a photon of light having a frequency of 3.50 x 1015 Hz. A. 1.05 x 1024 m B. 1.33 x 1016 m C. 8.57 x

Ann [662]

Answer:

1.17x107m

Explanation:

7 0

3 years ago

Assessment timer and count

Aneli [31]

Answer:

I think it's the last one.

Explanation:

Because gravity is what makes our planets stay still and stops our planets from dropping and as they orbit around the sun that's what keeps the moon from bumping into earth. I hope this helps and makes sense.

<h3>p.s. can I pls be ur brainliest answer, I'd appreciate it </h3>

3 0

3 years ago

A soft silvery metal has two naturally occurring isotopes: mass 84.9118, accounting for 72.15% and mass 86.9092, accounting for

zloy xaker [14]

Answer: The atomic weight of the metal would be 85.47.

Explanation:

Mass of isotope 1 of metal = 84.9118

% abundance of isotope 1 of metal = 72.15% = $\frac{72.15}{100}$