Combining Atoms
Terms
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- Chemical Bond
- A force that holds two or more atoms together.
- molecule
-
A group of atoms held together by one type of chemical bond.
( A molecule is made up of two or more atoms.) - chemical symbol
- Is one or two letters that stand for the name of an element.
- formula
- is a group of symbols that shows how many atoms of each element are in a molecule of a compound.
- Two or more elements combined chemically to form a new substance.
- Compound
- Have properties of both metals and nonmetals.
- semimetals
- Number of protons in one atom of an element.
- atomic number
- Something made of only one kind of matter.
- substance
- One or two letters that stand for the name of an element.
- chemical symbol
- Elements that have no shine, cannot be shaped and are poor conductors of heat and electricity.
- nonmetals
- Substance that cannot be broken down by simple means into any other substance.
- Element
- Trait that can be observed and measured without changing the identity of a material.
- Physical property
- Group of symbols that shows how many atoms of each element are in a molecule of a compound.
- formula
- Anything that has mass and takes up space.
- matter
- Two or more atoms held together by one type of chemical bond.
- molecule
- Way to describe how something looks or acts or a way to think about something.
- model
- Gases that do not react readily with other elements.
- noble gases
- Describes how one substance reacts with another substance.
- Chemical property
- Elements that are shiny, have high densities, and are good conductors of heat and electricity.
- metals
- Matter that contains two or more substances that do not change their identities.
- mixture
- A force that holds two atoms together
- chemical bond
- Name two ways matter can be classified.
-
1. Substance
2. Mixture - What are building blocks of matter?
- Elements
- What are the largest group of elements?
- metals
- What gases used to be called inert gases?
- noble gases
- Three examples of physical properties
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Luster
density
mass - How can elements be classified?
- Elements can be clasified as physical or chemical properties.