Untitled Chemistry Past Paper PDF

## Questions (62) ### 1 - Quiz Chemistry is called the **central** science because it relates directly to all other science fields. ### 2 - Quiz The branch of chemistry that deals with compounds that do not contain carbon is **inorganic**. ### 3 - Quiz Put into scientific notation with correct...

## Questions (62) ### 1 - Quiz Chemistry is called the **central** science because it relates directly to all other science fields. ### 2 - Quiz The branch of chemistry that deals with compounds that do not contain carbon is **inorganic**. ### 3 - Quiz Put into scientific notation with correct number of sig figs: 42,000 * **4.2 x 10^4** ### 4 - Quiz Matter: * **Has mass** * **Takes up space** ### 5 - Quiz Which state of matter has definite volume but not definite shape? * **liquid** ### 6 - Quiz Where are protons found in atoms? * **in the nucleus** ### 7 - Quiz Melting aluminum metal is an example of: * **a physical change** ### 8 - Quiz Which of these is a homogenous mixture? * **air** ### 9 - Quiz Which of these is a compound? * **CaCO₃** * **water** * **copper chloride solution** ### 10 - Quiz Which of these is CHEMICAL property? * **flammability** ### 11 - Quiz In a chemical reaction, the mass of the reactants... * **is equal to the mass of the products** ### 12 - Quiz Which of these is a Homogenous mixture? * **salt water** ### 13 - Quiz Which of these is a heterogeneous mixture? * **macaroni in tomato soup** * **An alloy like bronze** ### 14 - Quiz What is the estimated digit in this measurement? 5,279.10 * **The 0** ### 15 - Quiz Which number has 2 significant digits? Select all that apply. * **8.2* * **0.82** ### 16 - Quiz Put this number into scientific notation: .0045 * **4.5 x 10^-3** ### 17 - Quiz If the density of a liquid is 2g/ml and the volume of the liquid is 10ml, what is the mass? D = m/v * **20g** ### 18 - Quiz 275 + 9.3 = **284** (properly round) ### 19 - Quiz Round this number to 1 significant figure: 0.047 * **0.05** ### 20 - Quiz Express the sum of 7.68 m and 5.0 m using the correct rounding rules. * **12.7 m** ### 21 - Quiz Express the product of 2.2 mm and 5.00 mm using the correct rounding rules. * **11 mm²** ### 22 - Quiz Calculate the atomic mass. * **14.107 amu** ### 23 - Quiz The fact that Argon's atomic mass is 39.948 would mean that Argon-39 is **less common** than Argon-40. ### 24 - Quiz How many protons, neutrons, and electrons are found in the sodium ion below? * **P=11, N=12, E=10** ### 25 - Quiz What happened in J.J. Thomson's Cathode Ray Tube experiment? * **Negatively charged electrons repelled by positive plates** ### 26 - Quiz Who did the Gold Foil Experiment? * **Ernest Rutherford** ### 27 - Quiz How many protons, and neutrons does this atom have? * **P=29, N=29** ### 28 - Quiz To calculate the number of neutrons in an atom you subtract the mass number minus atomic number * **True** ### 29 - Quiz How many protons, neutrons, and electrons are in carbon-14 shown below: * **P=6, N=8, E=6** ### 30 - Quiz Which of these is the electron configuration for silicon? * ** 1s² 2s² 2p⁶ 3s² 3p²** ### 31 - Quiz Which of these is the correct orbital diagram for oxygen? * **B** (A correctly drawn orbital diagram of oxygen) ### 32 - Quiz An element found in d-block would also: * **Be a transition metal** * **Have at least 21 electrons** ### 33 - Quiz Isotopes have **the same number of protons but different number of neutrons** ### 34 - Quiz What is an orbital? * **Region where electrons are likely to be found** ### 35 - Quiz The electron configuration that is not possible is: * **1s² 2s³** ### 36 - Quiz How many protons are in Chlorine? * **17** ### 37 - Quiz How many neutrons are in iron? * **30** ### 38 - Quiz Which atomic particle determines the chemical behavior of an atom? * **Electron** ### 39 - Quiz Which of these is correct about Carbon-13? * **7 neutrons** ### 40 - Quiz What orbital shapes are found at the 2nd energy level * **s and p** ### 41 - Quiz Ca⁺² has **20 protons** ### 42 - Quiz Which is true? * **4s fills before 3d** * **If n=5, it can hold 50 electrons** ### 43 - Quiz hydrogen walks into a bar & says "I think I lost an electron" bartender says "Are you sure?" * **"I'm positive"** ### 44 - Quiz Which electron configuration is correct? * **1s² 2s² 2p⁶ 3s²3p⁶ 4s² 3d¹⁰** ### 45 - Quiz Which ion is the smallest? * **O^2-** ### 46 - Quiz What is the photoelectric effect? * **when light shines on a material and electrons are emitted** ### 47 - Quiz 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶ is the electron configuration for * **Krypton** ### 48 - Quiz Which electron configuration is VALID for a neutral atom? * **none of these are valid** ### 49 - Quiz What is the element shown in the orbital diagram below? * **Phosphorus** ### 50 - Quiz Which of these is always equal to the element's atomic number? * **Number of protons** ### 51 - Quiz The 14 in Carbon-14 indicates * **the mass #** ### 52 - Quiz Which orbital diagram is correct? * **A** (A correctly drawn orbital diagram of phosphorus) ### 53 - Quiz Which characteristics are found in all metals? (select all that apply) * **malleable** * **conduct electricity** * **luster** ### 54 - Quiz Which of these would be have the lowest ionization energy? * **Rb** ### 55 - Quiz Another name for inner-transition metals * **f-block** ### 56 - Quiz Which of these is an alkaline earth metal? * **Ba** ### 57 - Quiz Transition metals: * **are found in d-block** ### 58 - Quiz Which is a metalloid? * **B** ### 59 - Quiz Which element is in p block? * **Cl** ### 60 - Quiz Which element is in the 2 period? * **Li** ### 61 - Quiz What is the shape of a p-orbital? * **dumbell** ### 62 - Quiz Which element will NOT form a +2 cation? * **Al**