Electrons study

How many Valence electrons does Beryllium have?

2.

What source supplied the electrons JJ. Thompson's Cathode Ray Tube Experiment?

A simple electric current allowed electrons to flow through the tube.

Charged, and are one of the types of particle which make up atoms.

Electrons are negatively charged, and are one of the types of particle which make up atoms.

Nothing was known about atoms before electrons were discovered.

False.

Which of the following scientists discovered the electron?

JJ. Thompson.

Before JJ Thompson began gathering evidence about electrons in 1897, what did scientists know about atoms?

Scientists generally thought atoms were the smallest particles that could not be broken down any further.

What evidence from the Cathode Ray Tube Experiment support the claim that electrons have a negative charge?

The Cathode Ray Brent away from a negatively charged plate. TheCathode Ray Brent toward a positively charged plate.

What evidence from the Cathode Ray Tube Experiment support the claim that electrons have a negative charge?

The Cathode Ray bent way from a negatively charged plate. The Cathode Ray Brent toward a positively charged plate.

Which of the following best describes how Thomson concluded that electrons are present in all atoms.

The change-to-mass ratio of electrons is always the same constant, no matter which substances are used in the Cathode Ray Tube.

Electrons can be deflected by a magnetic field.

True.

Which statement(s) about electrons is/are true?

When they were first discovered, they were named "corpuscles". They have a negative charge. they have a tiny but significant mass.