Periodic Table and Atoms PRACTICE FLASHCARD

Front

What is an atomic number?

Back

The atomic number is the number of protons in the nucleus of an atom, which also equals the number of electrons in a neutral atom.

Front

Which elements have similar chemical and physical properties?

Back

Elements in the same group (column) of the periodic table have similar properties. For example, K (Potassium), Cs (Cesium), and Fr (Francium) are in Group 1.

Front

True or False: Electrons and Protons are attracted to each other.

Back

True. Electrons are negatively charged and protons are positively charged, leading to an attractive force between them.

Front

True or False: Elements with a low melting point generally have high reactivity.

Back

True. Many nonmetals and alkali metals have low melting points and are highly reactive.

Front

What happens to oppositely charged particles?

Back

Oppositely charged particles attract each other.

Front

What is the role of electrons in an atom?

Back

Electrons are negatively charged particles that orbit the nucleus and are involved in chemical bonding.

Front

What are groups in the periodic table?

Back

Groups are vertical columns in the periodic table that contain elements with similar chemical properties.

Front

What are periods in the periodic table?

Back

Periods are horizontal rows in the periodic table that indicate the number of electron shells in the atoms.

Front

What is a chemical property?

Back

A chemical property is a characteristic of a substance that can only be observed during a chemical reaction, such as reactivity.

Front

What is a physical property?

Back

A physical property is a characteristic that can be observed without changing the substance's chemical identity, such as color or melting point.