Elements and the Periodic Table

Front

What did Rutherford's gold foil experiment reveal about the structure of the atom?

Back

Rutherford inferred that an atom's positive charge must be clustered in a tiny region in its center, known as the nucleus.

Front

What are the horizontal rows in the periodic table called?

Back

They are called periods, not groups.

Front

What particles does beta radiation consist of?

Back

Beta radiation consists of particles that are identical to electrons.

Front

How did Mendeleev arrange the first periodic table?

Back

Mendeleev arranged the first periodic table by increasing atomic mass.

Front

What property do elements that easily transmit electricity and heat display?

Back

They display the property known as conductivity.

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.

Front

What is the significance of the periodic law?

Back

The periodic law states that the properties of elements are a periodic function of their atomic numbers.

Front

What are alkali metals?

Back

Alkali metals are the elements in Group 1 of the periodic table, known for being highly reactive and having one electron in their outer shell.

Front

What is the difference between metals and nonmetals?

Back

Metals are typically shiny, good conductors of heat and electricity, and malleable, while nonmetals are usually dull, poor conductors, and brittle.

Front

What is an isotope?

Back

Isotopes are variants of a particular chemical element that have the same number of protons but different numbers of neutrons.