Roe Chem Unit 1 Review

Front

A charged particle that has gained or lost electrons is called a _____

Back

ion

Front

Which elements have the most similar chemical properties?

Back

K and Na

Front

J.J. Thomson discovered negatively charged particles called __________________ and developed the ________________________ model to try to explain their existence in a neutral atom.

Back

electrons; Plum-Pudding

Front

What element in Period 4 has 5 valence electrons?

Back

As

Front

What kind of element forms covalent bonds?

Back

non-metals

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What is the difference between an ion and an isotope?

Back

An ion is a charged particle due to the loss or gain of electrons, while an isotope is a variant of an element with the same number of protons but a different number of neutrons.

Front

What is a covalent bond?

Back

A chemical bond formed by the sharing of electron pairs between atoms.

Front

What are the main groups of the periodic table?

Back

Alkali metals, alkaline earth metals, transition metals, halogens, noble gases.

Front

What is the significance of valence electrons?

Back

Valence electrons determine an atom's chemical properties and its ability to bond with other atoms.