Elements and the Periodic Table

Front

What are nonmetals and where are they located on the periodic table?

Back

Nonmetals are elements that are typically poor conductors of heat and electricity. They are found on the right side of the periodic table.

Front

What is radioactivity?

Back

Radioactivity is the spontaneous emission of radiation by an unstable atomic nucleus, a term coined by Marie Curie.

Front

What did Rutherford's gold foil experiment reveal about atomic structure?

Back

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

Front

What is the main flaw in Thompson's model of the atom?

Back

Thompson's model incorrectly suggested that electrons are embedded in a positively charged 'soup', rather than being in orbits around the nucleus.

Front

What are isotopes?

Back

Isotopes are atoms of the same element that have the same number of protons but different numbers of neutrons.

Front

What is the periodic table?

Back

The periodic table is a tabular arrangement of elements, organized by increasing atomic number, which shows periodic trends in properties.

Front

What is an atomic nucleus?

Back

The atomic nucleus is the central part of an atom, containing protons and neutrons, and is positively charged.

Front

What are metals and where are they located on the periodic table?

Back

Metals are elements that are good conductors of heat and electricity, and they are located on the left side and in the center of the periodic table.

Front

What is the significance of the atomic number?

Back

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

Front

What are valence electrons?

Back

Valence electrons are the electrons in the outermost shell of an atom, which are involved in chemical bonding.