General Chemistry Concepts

What are protons?

• Negatively charged particles found in the nucleus of an atom.

• Positively charged particles found in the nucleus of an atom.

• Neutral particles found in the nucleus of an atom.

• Positively charged particles found in the electron cloud.

What is the mass number?

• The mass number is the total number of protons and neutrons in the nucleus of an atom.

• The mass number is the total number of electrons in an atom.

• The mass number is the average mass of all isotopes of an element.

• The mass number is the number of protons in the nucleus of an atom.

What is a molecule?

• A molecule is a single atom.

• A molecule is a group of two or more atoms bonded together.

• A molecule is a type of chemical reaction.

• A molecule is a form of energy.

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What is a chemical reaction?

• A process that involves the rearrangement of atoms to form new substances.

• A method of mixing chemicals without any change.

• A technique used to measure the temperature of substances.

• A way to separate mixtures into their individual components.

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What is a covalent bond?

• A chemical bond formed when two atoms share electrons.

• A bond formed by the transfer of electrons from one atom to another.

• A weak attraction between molecules due to temporary dipoles.

• A bond that occurs between metal and non-metal atoms.

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What is an ionic bond?

• A bond formed by the sharing of electrons between atoms.

• A bond formed through the transfer of electrons from one atom to another, resulting in the attraction between oppositely charged ions.

• A bond that occurs only in metals.

• A bond that involves the formation of a covalent structure.

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What is a chemical formula?

• A representation of a substance using symbols for its constituent elements and numbers to indicate the ratio of atoms.

• A method to calculate the mass of a substance based on its volume.

• A visual diagram showing the structure of a molecule.

• A type of equation used to balance chemical reactions.

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What are electrons?

• Negatively charged particles that orbit the nucleus of an atom.

• Positively charged particles found in the nucleus of an atom.

• Neutral particles that do not have any charge.

• Particles that are responsible for the mass of an atom.

Why do sodium and chlorine atoms attract each other in a salt crystal?

• Sodium has a positive charge and chlorine has a negative charge.

• Both sodium and chlorine have positive charges.

• Sodium has a negative charge and chlorine has a positive charge.

• Sodium and chlorine have no charge and attract due to proximity.

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Who discovered neutrons?

• James Chadwick

• Ernest Rutherford

• Niels Bohr

• Marie Curie