Unlike neutral atoms, ions have a different number of electrons than protons. The electrons are attracted to the protons and repelled by other electrons. If another electron is added, the repulsion between electrons
increases while the attractive force of the nucleus stays the same. As a result, the electron cloud expands.
If an electron is lost, the cloud is pulled in more tightly. Electron repulsions decrease while the number of
protons remains constant.

Which of these best describes the scientific process

Nebulae are enormous clouds in outer space. they are made mostly of hydrogen gas, helium gas, and dust. some nebulae glow brightly, while others do not. the stars that people see are huge, bright balls of glowing gas. they are made mostly of hydrogen and helium. which statement correctly describes other ways in which nebulae and stars are different? a. stars can form inside a nebula but a nebula can never be produced by any star. b. a star always has a higher density than a nebula. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star.

Quiz1. which physical state of nitrogen has the highest entropy? a solid© b gasoc liquid