Using the doppler effect helps astronomers calculate how fast the stars and other objects move toward or away from earth.
Answer:
Hydrogen bond: A weak bond in which a hydrogen atom in one molecule is attracted to an electronegative atom, in the same or different molecule. Covalent bond: A type of chemical bond where two atoms are connected to each other by the sharing of two or more electrons.
Explanation:
Answer:
The nucleus binds together the protons and don't allow them to react with the freely movable electrons. The nucleus contains only neutrons and protons. Neutrons have no charge and don't react at all. Protons have positive charge. The force of attraction can't occur between the protons and electrons because of the nucleus' wall.
Answer:
i thing this is answer
Explanation:
i thing so but i am not sure
They all look right to me sorry if you get any wrong...