If element X has 78 protons, how many electrons does it have?

Which of these discoveries contradict components of Dalton's atomic theory? Check all of the boxes that apply. Atoms contain smaller particles: protons, neutrons, and electrons. Atoms of a given element can bond to other atoms only in specific ways.

An ionic compound is a compound that consists of molecules made of atoms that are covalently bonded. True or False?

When two or more atoms combine into a chemical compound, the force of attraction holding the atoms together is known as a ...

The threshold of hearing is defined as the minimum discernible intensity of the sound. It is approximately 10âˆ'12w/m2. Find the distance d from the car at which the sound from the stereo can still be discerned.

What is the speed of an object in its rest frame? A. 0 m/s B. 100,000 m/s C. 200,000 m/s D. 300,000 m/s

Which is a use of fiber optics?

When a positively charged conductor touches a neutral conductor, the neutral conductor will:

Definition of the rule E=mc^2

A 3.7 kg block is pushed along a horizontal floor by a force modifyingabove upper f with right-arrow of magnitude 25 n at a downward angle θ = 40°. the coefficient of kinetic friction between the block and the floor is 0.26.

When one object heats another, does the temperature increase of one object always equal the temperature decrease of the other object? Explain