Unit 1 Review: Matter, Atoms, and the Periodic Table | Baamboozle - Baamboozle

English 29 Public

Atoms, Elements, Compounds, Mixtures, Separating Mixtures, History of Atomic Models, Reading the Periodic Table, Ions, Isotopes, Properties of Families

Study Slideshow

How many energy levels does phosphorus have?

Phosphorous (P) is in period 3, so it has 3 energy levels

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How many valence electrons does oxygen have?

Oxygen (O) is in group 16, so it has 6 valence electrons

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How many protons does sulfur have?

Sulfur's atomic number is 16, so it has 16 protons

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How many electrons does a neutral atom of calcium have?

Calcium's atomic number is 20, so it has 20 protons. A neutral atom has the same number of protons and electrons, so 20.

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Why does argon not react with other elements?

Ar is a noble gas. Noble gasses have a full valence shell, so they are energetically stable

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What did JJ Thompson discover?

The electron, using the cathode ray tube experiment

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What did the gold foil experiment prove?

Atoms are mostly empty space, with a small, dense, positively-charged center

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Who discovered that elements always combine in the same ratios (the Law of Constant Composition)?

John Dalton

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Which family of elements is most electrically conductive?

Metals

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Which element is brittle at room temp: Potassium, Calcium, Sulfur, Gold, Aluminum

Sulfur, because it is a nonmetal. We saw this in the metals, nonmetals, metalloids lab.

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What is the most common isotope of silicon?

Silicon-28

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What is the most common/stable ion of magnesium?

Mg2+

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What is the most common/stable ion of chlorine?

Cl1-

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Why does sulfur form an anion with a charge of 2- ?

Sulfur has 6 valence electrons, so it wants two more to fill its valence shell

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What is another name for a homogenous mixture?

A solution

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Metal alloys are... elements, compounds, homogenous mixtures, or heterogenous mixtures?

Homogeneous mixtures. The metals are not bonded together

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Unit 1 Review: Matter, Atoms, and the Periodic T ...