If the statement is true, select True. If it is false, select False. In a physical change, some of the physical properties of the substance may be altered and the chemical composition remains the same.

True
False

True

Explanation:

Yes this statement is true.

In a physical change, some of the physical properties of the substance may be altered and the chemical composition remains the same.

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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.

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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.