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20-12-2019
Biology

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Compare and contrast elements and compounds (check all that are true): Group of answer choices Compounds are made of different types of atoms. Elements cannot be broken down by physical or chemical changes Compounds can be physically separated. Elements are made of only one type of atom. Compounds can be chemically separated. Compounds are made of the same type of atom

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20-12-2019

Answer:

Compounds are made of different types of atoms.

Elements cannot be broken down by physical or chemical changes

Elements are made of only one type of atom.

Explanation:

An Element is any one of the simplest chemical substances that CANNOT be decomposed in a chemical reaction or by any chemical means and made up of atoms all having the same number of protons. Examples are Sodium (Na), Nitrogen (N2), Aluminium (Al)

Compound is a substance formed by chemical union of two or more ingredients in definite proportions by weight. examples are NaCl (Sodium Chloride), NH3 (Ammonia)

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