Ch 2
Quiz by X. Pham
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14 questions
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- Q1What is the electric charge of a proton?0 elementary charge+2 elementary charges-1 elementary charge+1 elementary charge60s
- Q2Where is a proton located within an atom?In the outer energy levelsIn the valence shellIn the nucleusIn the electron cloud60s
- Q3What does the atomic number tell you?The number of neutrons in an atom.The number of electrons in an atom.The mass of an atom.The number of protons in an atom's nucleus.60s
- Q4What does the mass number of an atom tell you?The atomic number of the elementThe number of protons in the nucleusThe number of electrons in the atomThe total number of protons and neutrons in the nucleus60s
- Q5What are isotopes?Atoms of different elements with the same number of protons.Atoms of the same element with the same number of protons and electrons.Atoms of different elements with the same number of neutrons.Atoms of the same element with the same number of protons but a different number of neutrons.Atoms of the same element with the same number of neutrons but a different number of protons.60s
- Q6What is a colloid mixture?A mixture in which particles dissolve completelyA mixture in which particles settle down at the bottomA mixture in which particles float on the surfaceA mixture in which particles react chemicallyA mixture in which particles are dispersed in a continuous medium; particles are small not visible and will not settle out60s
- Q7What is molecular weight?The number of electrons in a moleculeThe volume occupied by a moleculeThe total number of atoms in a moleculeThe average weight of all the atoms in a molecule60s
- Q8What is the octet rule?Atoms tend to gain, lose or share electrons in order to obtain a full outer shellOctet rule is the process of atoms combining to form compoundsOctet rule is the rule that states that atoms have eight valence electronsAtoms in the periodic table arrange themselves in groups of eight60s
- Q9What is the bond between Na and Cl?Ionic bondMetallic bondCovalent bondHydrogen bond60s
- Q10What are the properties of water?It can bend metal.It can burn skin easily.It has a pH of 14.It's cohesive, regulates temperature, expands when frozen, and can dissolves many substances60s
- Q11What's the charge of a cation?+20-1+160s
- Q12What type of chemical reaction occurs when two or more substances combine to form a single compound?Decomposition reactionCombustion reactionReplacement reactionSynthesis reaction60s
- Q13What type of chemical reaction involves the exchange of atoms or groups of atoms between the reactants?Synthesis reactionExchange reactionCombustion reactionDecomposition reaction60s
- Q14What type of chemical reaction occurs when a compound breaks down into two or more simpler substances?Redox reactionReplacement reactionCombustion reactionDecomposition reaction60s