Radioactivity Discovery

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What did Henri Becquerel discover when he opened the case containing the photographic plate?

No image at all

An image of the desk drawer

An image of the paper wrapping

An image of the rock on the plate (correct)

Who named the phenomenon discovered by Henri Becquerel as 'radioactivity'?

Henri Becquerel

Another physicist colleague

Marie Curie (correct)

The phenomenon remained unnamed

How can radiation released by unstable isotopes be detected?

By placing a photographic film over samples containing the isotopes (correct)

By using a Geiger counter

By observing color changes in the samples

By using a microscope

What technique allows researchers to use isotopes as tracers in chemical reactions?

Exposing organisms to a reactant chemical labeled with a radioactive isotope Signup and view all the answers

What do algae and plants use as a raw material in photosynthesis?

Carbon dioxide (CO2) Signup and view all the answers

Which type of atoms tend to be chemically reactive?

Atoms with unfilled outer energy levels Signup and view all the answers

What is the characteristic of atoms like hydrogen in terms of reactivity?

They are highly reactive due to a single, unpaired electron in the outermost energy level Signup and view all the answers

What is the stability status of atoms like neon and argon?

Stable and chemically unreactive due to eight electrons completely filling the outer energy level Signup and view all the answers

What tendency do atoms like sodium exhibit in terms of electrons?

Readily lose electrons to reach a stable configuration Signup and view all the answers

What is the typical behavior of atoms like chlorine regarding electrons?

Tend to take up an electron from another atom to attain stability Signup and view all the answers

Radioactivity Discovery

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Questions and Answers

What did Henri Becquerel discover when he opened the case containing the photographic plate?

Who named the phenomenon discovered by Henri Becquerel as 'radioactivity'?

How can radiation released by unstable isotopes be detected?

What technique allows researchers to use isotopes as tracers in chemical reactions?

What do algae and plants use as a raw material in photosynthesis?

Which type of atoms tend to be chemically reactive?

What is the characteristic of atoms like hydrogen in terms of reactivity?

What is the stability status of atoms like neon and argon?

What tendency do atoms like sodium exhibit in terms of electrons?

What is the typical behavior of atoms like chlorine regarding electrons?

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