The atomic number of an element is 19. Which is true of this element?

A.

Each atom has an atomic mass of 19.

B.

Each atom has 19 neutrons.

C.

Each atom has 19 protons.

D.

Each atom forms 19 ions.

A hydrogen atom has a diameter of about 9.95 nm. Express this diameter in meters.

2. A motor with a resistance of 32 is connected to a voltage source. Four amps of current flows in the circuit. What is the voltage of the source?

Another important gas is water vapor, which condensesarouns

What is the streak of a mineral used for? A. weighing the mineral B. measuring the hardness of the mineral C. identifying the mineral D. finding the volume of the mineral

What is the maximum number of electrons that can occupy the 3rd electron shell?

A tennis ball may leave the racket of a top player on the serve with a speed of 60.0 m/s. If the ball's mass is 0.0600 kg and it is in contact with the racket for 0.

Cells are known as the foundation of all life. How have these small structures changed our planet?

What does it mean to dissolve something

Why is a neutral object attracted to a charged object?

The international space station revolves around earths surface. which of the following statement s is true? a. it has no energy because it is stationary b. it has potential energy, but does not have kinetic energy c.