Zinc (Zn) can be described as a bluish-white metal that is brittle at room temperature, conducts heat and electricity, and burns in air.
Which of the following is a chemical property of zinc?
A. Zinc is brittle at room temperature.
B. Zinc burns in air.
C. Zinc is bluish-white.
D. Zinc conducts heat

B. Zinc burns in the air.

Explanation:

A chemical property of an element is known as the property of that specific element that is apparent or visible when the element has gone through a chemical reaction with other substances or elements under investigation.

In this case, the correct answer is option B which is " Zinc burns in the air" because it shows zinc to react chemically with air which then changes its properties.

The others are just physical properties of zinc

precipitation

explanation:

when it goes from cloud to rain/back to earth in the form of rain

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.