PLEASE HELP! DUE IN 5 MINUTES! ( 10 points )
An atom of gold with 79 protons, 79 Electrons and 118 neutrons would have a mass number of....
A) 39
B) 158
C) 197
D) 276

Answer:

C

Explanation:

An atom of gold with 79 protons, 79 Electrons and 118 neutrons would have a mass number of  197 gold. Therefore, option C is correct.

The total number of protons and neutrons in an atomic nucleus is known as the mass number, often known as the atomic mass number or nucleon number. In atomic mass units, it is roughly equivalent to the atom's atomic mass.

Because it indicates the mass of the entire number of protons and neutrons in an element, the mass number of an element is so named. The atomic number and atomic mass of an element are typically listed in periodic tables along with the chemical symbols for each element.

The third element in the periodic table's eleventh column is gold. It is under the transition metal category. The most common isotope of gold has 118 neutrons and 79 protons together with 79 electrons.

Thus, option C is correct.

To learn more about mass number, follow the link;

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Which phrase describes the parts of a solution but NOT the parts of a heterogeneous mixture?

A.) evenly mixed
B.) chemically bonded
C.)always a single type of atom
D.) easily visible with a unaided eye

The phase of matter can be changed by:

a) increasing temperature
b) decreasing mass
c) increasing volume
d) all of the above

help please, thank you !!

HELP ITS DUE TOMORROW ​

Why are gamma rays not affected by a magnet as they pass over it?

a) Gamma rays do not have enough mass to be affected.
b)Gamma rays do not have the right electrical charge to be affected.
c) Gamma rays are composed of only energy.
d) Gamma rays move too fast for anything to affect their pathway.

what is the volume of a marble that has a mass of 3.g and a Density of 2.7 g/ml ?
make sure to round to the nearest tenth

Mitochondria are very important to the cell and are sometimes called the powerhouses of the cell. Imagine that a certain virus penetrates a cell and reaches the mitochondria. Predict what would happen to the cell if the virus were able to destroy all of the cell's mitochondria.

A. The cell would eventually die without the ATP that it needs for activities

B. The cell would be unaffected by the loss of mitochondria and will continue to function normally

C. The cell would rapidly produce more proteins

D . The cell would multiple uncontrollably because there is nothing to stop it anymore.

Carlos is using the following images of a coal plant and a barbecue for his science investigation about chemical energy. Based on his observations, which statement most likely describes the conclusion of his investigation?

a coal plant


a barbecue


The images show examples of chemical energy being converted into heat and electrical energy.
The images show examples of mechanical energy being converted to heat energy.
The power plant and the barbecue convert electrical energy into chemical energy.
The power plant and the barbecue store heat energy and convert it to chemical and electrical energy.

What is most likely to occur during a chemical reaction?
a Molecules of the original substance are lost. b New atoms are created. c The original substance maintains its properties. d Mass is conserved.

Which statements are true of geothermal energy? Check all that apply.

It is constantly being produced inside the Earth.
Hot water from hot springs or reservoirs is used in heating systems.
It is created by energy from the Sun.
It can be used to generate electricity.
It can be unreliable because it is affected by the weather.
The United States is the world leader in generating power from geothermal energy.