Jan 19 8:37 AM. Jan 19 8:56 AM. Chemistry Philip Hunter
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1 Chemistry Philip Hunter Questions Problem solving and unit conversions History of chemistry > Mendeleev & Periodic Table > metals / nonmetals > alkali metals > alkaline earth metals > halogens > noble gases > main group elements > transition metals atomic number Diatomic elements Electric charge This week: Complete Study Group assignment Study for Quiz 2 Write Fe & S lab report Prepare for Lab C Jan 19 7:46 AM Jan 19 8:37 AM Mar 28 12:41 PM Jan 19 8:56 AM 1
2 Hydrogen (H) Helium (He) Mass = 1.0 u Not metallic Mass = 4.0 u Not metallic With hydrogen: H 2 With oxygen: H 2 O Burns in oxygen. Does not react with water. Does not form any molecules. Does not react with anything. Lithium (Li) Mass = 6.9 u Metallic. Density = 0.5 g/ml Hardness = 0.6 With hydrogen: LiH With oxygen: Li 2 O Corrodes quickly in air. Reacts violently with water to produce hydrogen Beryllium (Be) Mass = 9.1 u Metallic. Density = 1.8 g/ml Hardness = 5.5 With hydrogen: BeH 2 With oxygen: BeO Reacts slowly in air. 2
3 Boron (B) Mass = 10.8 u Semi metallic. Density = 2.5 g/ml Hardness = 9.3 With hydrogen: BH 3 With oxygen: B 2 O 3 Carbon (C) Mass = 12.0 u Not metallic. Density = 2.3 g/ml With hydrogen: CH 4 With oxygen: CO 2 Reacts in air. Nitrogen (N) Oxygen (O) Mass = 14.0 u Not metallic. Mass = 16.0 u Not metallic. With hydrogen: NH 3 With oxygen: many different With hydrogen: OH 2 With oxygen: O 2 3
4 Fluorine (F) Neon (Ne) Mass = 19.0 u Not metallic. Mass = 20.2 u Not metallic With hydrogen: FH With oxygen: F 2 O Reacts with water to produce oxygen. Extremely corrosive to metals and living organisms. Does not form any molecules. Does not react with anything. Sodium (Na) Mass = 23.0 u Metallic. Density = 0.9 g/ml Hardness = 0.5 With hydrogen: NaH With oxygen: Na 2 O Corrodes quickly in air. Reacts violently with water to produce hydrogen Magnesium (Mg) Mass = 24.3 u Metallic. Density = 1.7 g/ml Hardness = 2.5 With hydrogen: MgH 2 With oxygen: MgO Reacts slowly in air. 4
5 Aluminum (Al) Mass = 27.0 u Metallic. Density = 2.7 g/ml Hardness = 2.7 With hydrogen: AlH 3 With oxygen: Al 2 O 3 Silicon (Si) Mass = 28.1 u Semi metallic. Density = 2.3 g/ml Hardness = 6.5 With hydrogen: SiH 4 With oxygen: SiO2 Reacts in air. Phosphorus (P) Mass = 31.0 u Not metallic. Density = 1.8 g/ml With hydrogen: PH 3 With oxygen: P 4 O 6 Burns in air. Sulfur (S) Mass = 32.1 u Not metallic. Density = 2.0 g/ml With hydrogen: SH 2 With oxygen: several different Burns in air. 5
6 Chlorine (Cl) Mass = 35.5 u Not metallic. With hydrogen: ClH With oxygen: Cl 2 O Reacts with water to produce bleach (HOCl). Extremely corrosive to metals and living organisms. Potassium (K) Mass = 39.1 u Metallic. Density = 0.9 g/ml Hardness = 0.4 With hydrogen: KH With oxygen: K 2 O Corrodes quickly in air. Reacts violently with water to produce hydrogen Mass = 39.9 u Argon (Ar) Not metallic Does not form any molecules. Does not react with anything. Calcium (Ca) Mass = 40.1 u Metallic. Density = 1.6 g/ml Hardness = 1.8 With hydrogen: CaH 2 With oxygen: CaO Reacts slowly in air. 6
7 Gallium (Ga) Mass = 69.7 u Metallic. Density = 5.9 g/ml Hardness = 1.5 With hydrogen: GaH3 With oxygen: Ga2O3 Germanium (Ge) Mass = 72.6 u Semi metallic. Density = 5.3 g/ml Hardness = 6.0 With hydrogen: GeH4 With oxygen: GeO2 Reacts in air. Arsenic (As) Mass = 74.9 u Semi metallic. Density = 5.7 g/ml Hardness = 3.5 With hydrogen: AsH3 With oxygen: As2O3 Burns in air. Selenium (Se) Mass = 79.0 u Not metallic. Density = 4.8 g/ml With hydrogen: SeH2 With oxygen: several different Burns in air. 7
8 Bromine (Br) Krypton (Kr) Mass = 79.9 u Not metallic. Mass = 83.8 u Not metallic With hydrogen: BrH With oxygen: Br2O Reacts with water to produce HOBr. Forms almost no molecules. Reacts with almost nothing. Rubidium (Rb) Mass = 85.5 u Density = Hardness = With hydrogen: With oxygen: Strontium (Sr) Mass = 87.6 u Density = Hardness = With hydrogen: With oxygen: 8
9 Tellurium (Te) Mass = u Density = Hardness = With hydrogen: With oxygen: Iodine (I) Mass = u Density = Hardness = With hydrogen: With oxygen: Unknown 3 (X) Mass =? Metallic. Density = 1.5 g/ml Hardness = 0.3 With hydrogen: XH With oxygen: X2O Corrodes quickly in air. Unknown 1 (A) Mass =? Metallic. Density = 2.6 g/ml Hardness = 1.5 With hydrogen: AH2 With oxygen: AO Reacts in air. 9
10 Unknown 4 (Z) Mass =? Semi metallic. Density = 6.2 g/ml With hydrogen: ZH2 With oxygen: several different Burns in air. Mass =? Unknown 2 (D) Not metallic Forms almost no molecules. Reacts with almost nothing. 10
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