Atoms and Elements Study Notes

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Questions and Answers

What is an atom?

The smallest unit of an element that still has the properties of that element (correct)

The control center of a cell

A subatomic particle with a positive charge

A substance made up of two or more elements

What is a proton?

A subatomic particle that has a positive electric charge.

What is the nucleus?

The center of an atom, usually made of protons and neutrons.

What is a neutron?

A subatomic particle that has the same mass as a proton but no electric charge. Signup and view all the answers

What is an electron?

A subatomic particle that has a negative electric charge. Signup and view all the answers

What does atomic number refer to?

The number of protons in an atom. Signup and view all the answers

Define an element.

A substance made up of only one kind of atom. Signup and view all the answers

What is a metal?

A substance that conducts heat and electricity well and is malleable. Signup and view all the answers

What is a nonmetal?

A substance that does not conduct electricity and is not malleable. Signup and view all the answers

What is a periodic table?

A table that shows the elements arranged by their atomic numbers. Signup and view all the answers

What is a compound?

A substance made up of atoms of two or more elements that are chemically combined. Signup and view all the answers

What is melting point?

The temperature at which a substance changes from a solid to a liquid. Signup and view all the answers

What is boiling point?

The temperature at which a substance changes from a liquid to a gas. Signup and view all the answers

Define plasma.

A state of matter made up of charged atoms, uncharged atoms, and free electrons. Signup and view all the answers

What are isotopes?

Atoms that have the same number of protons but different numbers of neutrons. Signup and view all the answers

What does fusion mean?

To put together. Signup and view all the answers

What are molecules?

The smallest physical unit of an element or compound. Signup and view all the answers

What does malleable mean?

They bend easily and can be rolled into sheets. Signup and view all the answers

Study Notes

Atoms and Elements Study Notes

Atom: The fundamental unit of an element, retaining the element's characteristics.
Proton: Positively charged subatomic particle found in the nucleus of an atom.
Nucleus: The core of an atom, containing protons and neutrons; acts as the control center in cells.
Neutron: A subatomic particle with the same mass as a proton but lacks electric charge.
Electron: Negatively charged subatomic particle that orbits the nucleus and has negligible mass.
Atomic Number: Indicates the number of protons in an atom, determining the element's identity.
Element: A pure substance consisting only of one kind of atom, distinguished by its atomic number.
Metal: A class of elements known for their ability to conduct heat and electricity; typically malleable.
Nonmetal: Elements that do not conduct electricity well and are generally not malleable.
Periodic Table: A systematic arrangement of elements organized by increasing atomic number.
Compound: A substance formed when two or more different elements chemically bond together.
Melting Point: The specific temperature at which a solid transitions into a liquid.
Boiling Point: The temperature at which a liquid becomes a gas.
Plasma: A state of matter consisting of charged and uncharged atoms alongside free electrons.
Isotopes: Variants of the same element with the same number of protons but differing numbers of neutrons.
Fusion: The process of combining two or more entities into a single form.
Molecules: The smallest unit of a substance, either consisting of one type of atom (element) or multiple atom types (compound).
Malleable: A property of materials that allows them to bend and be shaped easily without breaking.

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Description

Explore the key concepts of atoms and elements through this informative quiz. Understand the roles of protons, neutrons, and electrons, and learn about the periodic table and the classification of metals and nonmetals. Perfect for students seeking to reinforce their knowledge in chemistry.