Question

A change in matter that does not produce a new substance is a chemical change.

Answer 1

Answer:

false

false

false

protons and neutrons

electrons

physical

physical

2

Explanation:

Answer 2

Answer:

1) False

2) False

3) True

4)Protons and Neutrons

5) Protons

6) Physical

7) Chemical

8) 7

Explanation:

1) False : In a chemical change there is formation of new substance.

2) False: Neutron is a neutral subatomic particle

3) True: Electron is negatively charged and proton is positively charged

4) Protons and neutrons are present in nucleus and electrons outside the nucleus

5) Protons: The atomic number of an element is number of protons. In a neutral atom the number of protons is equal to number of electrons

6) Physical : There is change in bondings during the boiling of an egg.

7) Chemical :The color changes when there is change in the structure of compounds or any reaction

8) 7:

Mass number = atomic number + number of neutrons

Number of neutrons = 14- 7 = 7