An atom of fuorine has an atomic number of 9 and an atomic mass of 19 how many protons neutrons and electrons does it have

Are aliens real. (Obviously they are I'm just bored)

How any electrons are shared in the covalent bond of two nitrogen atoms to form a nitrogen molecule? A. 2 B. 4 C. 6 D. 8

Which is an example of an internal stimulus? A: A sudden change of air temperate. B: an artificial light that attracts insects? C:an increase in the amount of water available to a plant? D: a decrease in oxygen levels in the blood during exercise?

is the only element in group 1 on the periodic table that forms covalent bonds. A) hydrogen B) lithium C) potassium D) sodium

What is the molar mass of H3PO4? (Molar mass of H = 1.0079 g/mol; P = 30.974 g/mol; O = 15.999 g/mol)

Have scientists found any reliable predictors for earthquakes, like radon gas release or weird animal behavior?

The table compares the characteristics of a substance in three different states of matter. Comparison of Characteristics Characteristic State X State Y State Z Average Kinetic Energy of the Molecules Low Greatest Least Particle Attraction/Forces

In an exothermic reaction the bonding energy of the product is?

How many molecules are contained in two 540.-mg tablets of penicillin (C16H18N2O4S, molar mass 334.4 g/mol) ? Report your answer with the appropriate number of significant figures.

What was the result of john Brown's raid on Harpers ferry