Please answer all questions and explain, except 1, 7, and 8, I will award brainliest. PLEASE HELP ASAP

2. Isotopes are atoms of the same element that have different numbers of neutrons but the same number of protons and electrons.

3. Electrons

4. Titanium- Ti

5. a. e and p = 35, n = 45

b. e and p = 46, n = 60

c. e and p = 55, n = 78

6. Barium - atomic number = 56 and mass = 138

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i believe this is ur answer-138

Explanation:

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answer: the rate of diffusion increases with increase in temperature.

increase in temperature, increases the molecular/particles speed (kinetic energy. diffusion means movement of particles through the material.

generally, the heavier the particle the more it interacts with the environment and more the temperature matters. so higher temperature results in higher diffusion.

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.