Name Date Class 1 Reinforcement Atoms

1 Copyright Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, date ClassMatter 23 Each element is made of just one kind of atom. The number of protons in the Atoms of an ele-ment is unique to that element. The number of protons in an atom is called the atomic mass of an atom depends on the number of its protons and neutrons. The mass numberisthe sum of the protons and neutrons in the nucleus. The mass of an electron is so small that it isusually omitted in mass :Use the definitions of atomic number and mass number to help you fill in the blanks in the :Add electrons to complete the atomic models of helium and number 2 Mass number 412. SodiumAtomic number 11 Mass number 23 AtomsMeeting Individual NeedsReinforcement11 ElementSymbolNumber ofprotonsNumber ofneutronsNumber Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, date ClassCombinations of AtomsDirections:Define the following :Identify each of the following as a mixtureor a + and oilDirections.

2 Complete the following sentences using the correct tea is a type of mixture called a(n) water molecule is made up of two Atoms of _____ and one atom of substances in a(n) _____ can be physically separated from salt is made up of one ion of _____ and one ion of (n) _____ cannot be separated into its individual elements by Individual NeedsCopyright Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, date ClassMatter25 Directions:Complete the concept map using the terms in the list below. Pay particular attention to the linkingwords or statements between boxes. The completed diagram will help you organize the relationships betweenphysical states of matter on size and shapegasfreely moving and independenttakes the shape of its containerwaterProperties of MatterMeeting Individual NeedsReinforcement33meltfreezeboilcoolMa tter on together and moving freelymay bemay fills its containermolecules aremolecules aremolecules areresults inresults inresults inunique Earth exampleunique Earth exampleunique Earth exampl