Vocabulary for Matter and Elements

Question Answer
Matter Anything that takes up space or has a mass
Mass The material that makes up matter; can be measured
Volume The specific area an object takes up
Density D=m/v The amount of mass in a specific space
Atom The smallest part of an element, also the building blocks of matter
Electron Particle of an atom that has a negative charge, has an attractive force and moves around the nucleus
Proton Part of an atom with a positive charge, located inside the nucleus
Neutron Part of an atom with no charge, located in the nucleus
Periodic Table large grid that classifies the elements by their physical and chemical properties
Periods/Rows tell how many energy level each element has for the electrons to move around on
Groups/Columns tell how many valence electrons each element has
Valence Electrons the amount of electrons that move on the outer shell
Atomic Number the amount of protons inside of an atom's nucleus
Atomic Mass how much mass an element's atom has
Chemical Property the abilities of two or more substances to combine and create a new substance
Physical Property state of matter and appearance of a substance
Ionic Bond when elements lose or gain an electron during bonding
Covalent Bond when elements share electrons during bonding
Chemical Change/ Reaction elements bond together using the attractive force of electrons and create a reaction or change
Compound/ Molecule two or more elements combine in a specific ratio, creating a whole new substance
Mixture two or more substances that combine together keeping the original properties, DO NOT create a whole new substance
Noble Gases elements in group 18, these are the most stable elements, 8 valence electrons
Halogens elements in group 17, these are very reactive elements, 7 valence electrons
Alkali Metals elements in group 1, these are very reactive, 1 valence electron
Metalloids elements between metals and non-metals, have 3-7 valence electrons
Endothermic chemical change that absorbs energy
Exothermic chemical reaction that releases energy

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