Quiz On Atoms, Elements And Compounds! Basic Questions

Explanation
Pure Gold, Pure Silver, and pure Oxygen are all examples of elements. Elements are substances that cannot be broken down into simpler substances by chemical means. They consist of only one type of atom and are represented by symbols on the periodic table. In this case, gold (Au), silver (Ag), and oxygen (O) are all examples of elements because they are composed of only one type of atom.

Explanation
Water is composed of one hydrogen atom and two oxygen atoms, which chemically combine to form a molecule. A molecule is a group of atoms held together by chemical bonds. Therefore, the correct answer is "Molecules".

Explanation
An atom is the smallest particle of matter that retains the properties of an element. It consists of a nucleus containing protons and neutrons, with electrons orbiting around the nucleus. Atoms combine to form molecules, which are the building blocks of compounds. Elements are substances made up of only one type of atom. Therefore, the correct answer is Atom.

Explanation
A molecule is the smallest unit of a compound that retains the chemical properties of that compound. In the case of H2O, a molecule refers to a single unit of water, which consists of two hydrogen atoms bonded to one oxygen atom. Atoms are the basic building blocks of matter, elements are pure substances made up of only one type of atom, and compounds are substances made up of two or more different elements. Therefore, the correct answer is molecule.

Explanation
Matter refers to anything that has weight and takes up space. It includes both atoms and compounds, as well as other substances that exist in the physical world. Noodles, on the other hand, are a specific type of food and do not encompass all things that have weight and occupy space. Therefore, the correct answer is matter.