Give two characteristics about elements

According to the Bohr model of an atom, what happens when an electron moves from the second energy level to the third energy level and then back to the second energy level? Energy is absorbed and then stored in the atom.

Enumerate the challenges of the immune system?

14. How is the number of neutrons in the nucleus of an atom calculated? Add the number of electrons and protons together. Subtract the number of electrons from the number of protons. Subtract the number of protons from the mass number.

Match the description to the correct term. If the description matches both terms, use "both" for your answer. Cause (s) the temperature of the surroundings to decrease. Cause (s) a change in the temperature of the surroundings.

Match each description to the correct term. Column A 1. Electromagnetic wave: Electromagnetic wave 2. Transverse wave: Transverse wave 3. Longitudinal wave: Longitudinal wave 4. Mechanical wave: Mechanical wave 5. Wave: Wave Column B a.

When does a spring tide take place? At the beginning of spring Only during the spring season Only after spring is over At any time

The highest cloud are known as

What is the mass of 4.85 X 10^22 atoms of iron (Fe) ?

If element x has 95 protons how many electrons does it have

Which of the following when dissolved in deionized water would make a good conducting solution? a) methanolb) sugarc) baking soda