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.

Frequency distributions may be used to describe which of the following type (s) of variable Nominal, ordinal, interval, and radio data.

A dog walks with a speed of 1.5 m/s. How long will it take the dog to cross a yard of length 8 m?

Which diagram best illustrates what happens when electromagnetic waves strike a reflective material? A horizontal red curved line passes across a vertical black line labeled surface turning up as it crosses the black line.

Which are characteristics of the speed of light? Check all that apply. The speed of light is the speed all waves travel. The speed of light is the speed electromagnetic waves travel. The speed of light is 3.0 x 108 m/s in space.

Which of the following is required for work to be done on an object? A. In order for work to be done the object must move in the direction of the force and rotate. B.

Microwave, radio signal, light, earthquake which does not belong

A 9.0-v battery is connected to a bulb whose resistance is 2.5 ω. part a how many electrons leave the battery per minute?

What is the basic unit of matter? atom cell bacterium molecule Description

A person fires a 38 gram bullet straight up into the air. It rises, then falls straight back down, striking the ground with a speed of 345 m/s. The bullet embeds itself into the ground a distance of 8.9 cm before coming to a stop.

Subject: Science Why is it important to report experimental results honestly even when the results go against your hypothesis?