3 years ago

If the atomic number of an element is 9 and the mass number is 19, how many neutrons does the atom have? 10 9 19 28 1 points

1 answer:

6 0

Remember....

mass number= atomic number + number of neutrons

If the mass number is 19 and the atomic number is 9, then the number of neutrons is 19-9 which is 10.

You might be interested in

My Everest is the highest mountain on earth.its height is 8.848 km. Convert this height to feet. Write your answer in standard n

Vinvika [58]

Answer: $2.9(10)^{7} ft$

Explanation:

Firstly we need to know that $1 km=3280.84 ft$ , then we cam make the conversion:

$8848 km \frac{3280.84 ft}{1 km}=29,028,872.32 ft$ This is the height of Mount Everest in feet

However, we can express it using scientific notation by counting to the left the decimal spaces:

$29,028,872.32 ft \approx 2.9(10)^{7} ft$

3 0

3 years ago

The Hawaiian islands formed as a result of a hot spot.<br><br> A.)True <br><br> B.)False

choli [55]

Hello,

That is true.

8 0

3 years ago

Read 2 more answers

During free fall which object would have a greater acceleration, an object with a mass of 240 kg or an object with a mass of 10

inna [77]

Answer:

Leroy Jeakins

Explanation:

Catus jack f me in the asss

5 0

2 years ago

_________ is a systematic method of naming chemical compounds. This creates an unambiguous and consistent name for any chemical

Vlada [557]

Answer: IUPAC NOMENCLATURE

Explanation:

IUPAC stands for International Union of Pure and Applied Chemistry. They devised a systematic method for naming compounds in order to create a uniform global unambiguous system of nomenclature hence making it easier for researchers to share information more freely without the hindrance of reporting the same compound using different names in different parts of the world thus creating confusion in chemical literature.

6 0

3 years ago

What is Sublimation?

Stolb23 [73]

Answer:

When a solid turns to a gas.

Explanation:

4 0

3 years ago

Read 2 more answers