+ Chapter 4 Review. + Vocabulary Review! Matter Anything that has mass and takes up space.

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Presentation transcript:

+ Chapter 4 Review

+ Vocabulary Review! Matter Anything that has mass and takes up space.

+ Vocabulary Review! Atoms Very small particles that make up all matter

+ Vocabulary Review! Nucleus The center of the atom. Protons and neutrons are located here. Contains most of the mass of the atom.

+ Vocabulary Review! Proton Located in the nucleus. +1 charge 1 amu mass

+ Vocabulary Review! Neutron Located in the nucleus. 0 charge 1 amu mass

+ Vocabulary Review! Electron Located in the space around the nucleus. -1 charge 0 amu mass

+ Vocabulary Review! Subatomic Particles Protons, P+ electrons, e- Neutrons, N

+ Vocabulary Review! Electron Cloud Region surrounding the nucleus of an atom where an electron is most likely to be found

+ Vocabulary Review! Compound Two or more atoms chemically connected

+ Vocabulary Review! Atomic # The number of protons an atom has The top number on the periodic table squares

+ Vocabulary Review! Mass # The sum of protons and neutrons an atom has. The bottom number on the periodic table squares

+ Vocabulary Review! Isotopes Atoms of the same element containing a different number of neutrons

+ Vocabulary Review! Cation A positive ion, caused by losing 1 or 2 electrons.

+ Vocabulary Review! Anion A negative ion, caused by gaining 1 or 2 electrons.

+ What did Thomson discover? electrons

+ What did Dalton’s model of the atom look like? Like a marble

+ What is the atomic number of Selenium?

+ Write down an example of matter Anything: Pencil, Person, Air, Table, Etc.

+ What did Thomson’s model of the atom look like? Like a chocolate chip cookie

+ What is the name of our current model? Electron Cloud

+ What is the mass number of Selenium?

+ How many protons does Silicon have?

+ What is the charge and mass for an electron? 0 amu

+ How many neutrons does Krypton have?

+ What is the charge and mass for a proton? +1 1 amu

+ How many electrons does Silicon have?

+ NaCl is an ionic compound. What can their charges tell you about Na+ Cl- Opposite charges attract to form molecules

+ For an atom to be neutral, which two subatomic particles need to be present in the same amount? Protons electrons

+ Which subatomic particle is located in the energy levels of an atom? electron

+ How many electrons can be in the first energy level of an atom? 2

+ How many electrons can be in the second energy level of an atom? 8

+ Use the Periodic Table to draw an atom of Beryllium

+ Now change your Be atom into a cation. +2 charge

+ What is the charge and mass for a neutron? 0 1 amu

+ How many neutrons does Silicon have?