If an unknown element has a mass number of 14 and 7 neutrons how many protons are there

How long can a proton-antiproton pair exist without violating the principle of the conservation of mass?

The lone pairs in a water molecule cause it to have which shape?

Arrange the steps in order to describe what happens to a gas when it cools. The A particles of gas move slower. B The gas changes to a liquid. C The gas loses thermal energy. D The space between the gas particles decreases.

The subatomic particles that play the key role in determine the properties of an element electrons

Which of the following statements best describes a difference between mechanical waves and electromagnetic waves? Question 6 options: Mechanical waves can produce colored light, while electromagnetic waves cannot.

Read the two questions. Question 1: Should acid precipitation be a concern for the new age environmentalist? Question 2: Does acid precipitation in forests affect the reproduction rate in birds?

How is excitation in spectroscopy brought about

What is the best reason for a student to remove a dangling bracelet when heating test tubes of acidic solutions in a hot-water bath in a chemistry lab?

What does the electron cloud model describe A. Rapidly moving neutrons B. Rapidly moving protons C. A standing wave of electron wavicles surrounding the nucleus D. Rapidly moving nucleus

35mL of acid with an unknown concentration is titrated to completion using 63mL of 3.0 MNaOH. What is the concentration of the acid?