Question

Which statement describes an element? Check all that apply.

An element is a pure substance that cannot be broken down into a simpler form.

An element is made of two or more atoms that are chemically combined.

All elements are listed on the periodic table of elements.

An element symbol begins with a capital letter; if there is a second or even third letter, it is a lowercase letter.

Answer 1

An element is a pure substance made of only one type of atom, all elements are listed on the periodic table, and they have a unique chemical symbol with specific capitalization.

Step-by-step explanation:

Elements are fundamental substances that can be characterized by several key points. First, an element is a pure substance that cannot be broken down into a simpler form by ordinary chemical means. Each element is made up of only one type of atom.

Second, all known elements are listed on the periodic table of elements, a comprehensive chart that organizes elements by their properties. Third, each element has a unique chemical symbol that begins with a capital letter; if there is a second letter, it is always in lowercase. For example, the symbol for helium is He, not HE or he.

Answer 2

A. An element is a pure substance that cannot be broken down into a simpler form.

C. All elements are listed on the periodic table of elements.

D. An element symbol begins with a capital letter; if there is a second or even third letter, it is a lowercase letter.

Explanation -

Elements are the substances that occur in the simplest form and cannot be broken down to more simpler substances as they are made up of only one kind of atom. The elements are mentioned in the periodic table. Compounds are formed when elements merges with each other.

The first letter of an element is written in upper case whereas the next letter following it is written in lower case. Elements are not denoted by a chemical formula rather they are just denoted by symbols.