10 Questions
What are compounds composed of?
Atoms of two or more different elements
What are the fundamental building blocks of matter?
Atoms
Which particles make up the nucleus of an atom?
Positively charged protons and neutral neutrons
What is an example of a chemical compound?
Carbon monoxide
What is the difference between mixtures and compounds?
Mixtures are not directly bonded substances, while compounds are composed of bonded atoms of different elements
What type of bonds involve sharing of valence electrons?
Covalent bonds
Which type of compounds have strong bonds and are good electricity conductors?
Ionic compounds
What is the main difference between compounds and elements?
Elements cannot be separated, while compounds can be broken down into their elements
Which type of bonds involve opposite charged ions?
Ionic bonds
What is the main characteristic of mixtures?
They can be separated and isolated
Study Notes
Chemical Compounds and Elements
- Compounds are made of different atoms; example: carbon monoxide is made of oxygen and carbon
- Molecules are made of the same atoms; examples: oxygen gas, hydrogen gas, and nitrogen gas
- Mixtures can be separated and isolated; example: air is a mixture of various elements and compounds
- Chemical bonds hold atoms in compounds together; there are ionic and covalent bonds
- Ionic bonds involve opposite charged ions; covalent bonds involve sharing of valence electrons
- Compounds with ionic bonds are called ionic compounds; those with covalent bonds are covalent compounds
- Ionic compounds have strong bonds and are good electricity conductors; example: sodium chloride
- Covalent compounds have weak bonds and are poor electricity conductors; example: carbon dioxide
- Compounds and elements are pure substances; compounds are made of different atoms, while elements are made of the same type of atom
- Elements cannot be separated or broken down into simpler particles; compounds can be broken down into their elements
- The properties of compounds are different from their elements; example: sodium chloride is made of sodium and chlorine, which have very different properties
- Most chemical substances exist as compounds and it is difficult to find pure elements in nature
Test your knowledge of chemical compounds and elements with this informative quiz. Explore the differences between compounds and elements, the nature of chemical bonds, and the various properties and characteristics of these fundamental building blocks of matter.
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