Unit 1 Re-Test

Front

What are the two pieces of evidence for our current theory of the universe?

Back

Redshift and Cosmic Microwave Background (CMB)

Front

What happens in a nucleus during gamma decay?

Back

There are no changes in particles.

Front

Who suggested that the universe was made of invisible units called atoms?

Back

Democritus

Front

How many protons are in one atom of Beryllium?

Back

4

Front

What are columns in the Periodic Table called?

Back

Groups/Families

Front

What is redshift?

Back

Redshift is the phenomenon where light from an object is shifted to longer wavelengths as it moves away from the observer.

Front

What is Cosmic Microwave Background (CMB)?

Back

CMB is the afterglow radiation from the Big Bang, filling the universe and providing evidence for the Big Bang theory.

Front

What is gamma decay?

Back

Gamma decay is a type of radioactive decay where an unstable nucleus releases energy in the form of gamma rays without changing the number of protons or neutrons.

Front

Who is known as the father of modern atomic theory?

Back

John Dalton

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.