June 2002 Regents 1-10

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Questions 1-10 Questions 11-20 Questions 21-30 Questions 31-40 Questions 41-50

 

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Questions

AnswerExplanations
1 What is the electron configuration of a sulfur atom in the ground state?

(1) 2–4       (3) 2–8–4
(2) 2–6       (4) 2–8–6

4Ground State configurations are listed on the Periodic Table for each element.
2 The modern model of the atom shows that electrons are

(1) orbiting the nucleus in fixed paths
(2) found in regions called orbitals
(3) combined with neutrons in the nucleus
(4) located in a solid sphere covering the nucleus

2Electrons are found in orbitals outside the nucleus.

Protons and neutrons are located in the nnucleus.

3 Which compound contains ionic bonds?

(1) NO       (3) CaO
(2) NO2      (4) CO2

3Ionic compounds can be easily identified because they are on opposite ends of the periodic table. One metals and one nonmetal.

**Note Incorrect answers are all covalent (2 nonmetals)

4 All the isotopes of a given atom have

(1) the same mass number and the same atomic number
(2) the same mass number but different atomic numbers
(3) different mass numbers but the same atomic number
(4) different mass numbers and different atomic numbers

3Definition-Isotope

KNOW IT

5 What are two properties of most nonmetals?

(1) high ionization energy and poor electrical conductivity
(2) high ionization energy and good electrical conductivity
(3) low ionization energy and poor electrical conductivity
(4) low ionization energy and good electrical conductivity

1Use Table S Pick a nonmetal (fluorine) and compare it to a Metal (sodium)
 6 Which element is classified as a noble gas at STP?

(1) hydrogen     (3) neon
(2) oxygen        (4) nitrogen

3noble gas-Group 18
4Nitrogen=14

hydrogen= 3 *1=3

NH3=17

(part/whole) x100

8 Metallic bonding occurs between atoms of

(1) sulfur       (3) fluorine
(2) copper     (4) carbon

2Metals, so pick a metal
9 Atoms of the same element that have different numbers of neutrons are
classified as

(1) charged atoms      (3) isomers
(2) charged nuclei      (4) isotopes

 

4Definition of Isotope

KNOW IT

10 Compared to the radius of a chlorine atom, the radius of a chloride ion is

(1) larger because chlorine loses an electron
(2) larger because chlorine gains an electron
(3) smaller because chlorine loses an electron
(4) smaller because chlorine gains an electron

2Metals lose electrons and get smaller 

Nonmetals gain and get bigger

 

 

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