exam 1 (2) Flashcards

Provide the element name with a ground-state electron configuration of 1s²2s²2p⁶ 3s¹

1. sodium
2. carbon
3. oxygen

What is the ground-state electron configuration of Neon?

1. 1s²2s²2p⁶3s²3p⁶4s²
2. 1s²2s²2p⁶
3. 1s²2s²2p⁶3s²

Which of the following has the highest frequency?

1. x rays
2. microwaves
3. UV light

Elements in group 1A are considered _____________.

1. alkali Metals
2. halogens
3. noble Gases

Which of the following sets of elements are the most similar to each other?

1. F, Cl, Br, I
2. C, N, O, F
3. H, He

According to periodic trends, arrange the following ions, potassium, magnesium, and aluminum in order of increasing ionic size.

1. potassium ion, magnesium ion, and aluminum ion
2. aluminum ion, magnesium ion, and potassium ion
3. aluminum ion, potassium ion, and magnesium ion

As you move down a group of elements (family), the number of valence electrons

1. increases.
2. stays the same.
3. increases and then decreases.

1. What is the maximum number of electrons that can occupy the 4^th energy level or shell?

1. 4
2. 16
3. 32

How many subshells are found in the 2^nd energy level or shell?

1. 2
2. 4
3. 8

What is the maximum number of orbitals found in the 3^rd energy level or shell?

1. 3
2. 9
3. 18

Based on the following electron configuration, [Kr]5s²4d¹⁰5p⁵, this element would most likely _____.

1. gain an electron to form a -1 anion and could form an ionic bond with a metal
2. loss an electron to form a -1 anion and could form an ionic bond with a metal
3. gain an electron to form a -1 anion and could form an ionic bond with a nonmetal

Based on the following electron configuration, [Xe]6s², this element would most likely _____.

1. loss 2 electrons to form a +2 cation and could form an ionic bond with a metal
2. loss 2 electrons to form a +2 cation and could form an ionic bond with a nonmetal
3. gain 2 electrons to form a +2 cation and could form an ionic bond with a nonmetal

Identify the transition metal ion and the number of electrons with the following electron configuration, [Ar]4s⁰3d⁷.

1. cobalt (I) ion and 25 electrons
2. cobalt (II) ion and 25 electrons
3. cobalt (III) ion and 25 electrons

What is the electron configuration of a copper atom?

1. [Ar]4s²3d⁹
2. [Ar]4s¹3d¹⁰
3. [Ar]4s⁰3d¹¹

What is the electron configuration of a copper (II) ion?

1. [Ar]4s²3d⁷
2. [Ar]4s¹3d⁸
3. [Ar]3d⁹

What is the ground-state electron configuration of carbon?

1. 1s²2s¹2p³
2. 1s²2s²2p²
3. 1s²2s³2p¹

In which orbital does an electron add to in chlorine to form an octet?

1. 3s
2. 3p
3. 3d

What is the m_s value for an electron added to bromine to form an octet?

1. +1/2
2. -1/2
3. 0

In what block, group, and period on the periodic table can the atom with a 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁵ ground-state electron configuration be found?

1. p-block, group 7A, and period 3
2. p-block, group 7A, and period 4
3. p-block, group 7A, and period 5

In what block, group, and period on the periodic table can the atom with a 1s²2s²2p⁶3s¹ ground-state electron configuration be found?

1. s-block, group 1A, and period 2
2. s-block, group 1A, and period 3
3. s-block, group 1A, and period 4

How many electrons are in the most likely ion formed from an atom located in group 6A and period 3?

1. 16 electrons
2. 17 electrons
3. 18 electrons

How many electrons are in the most likely ion formed from an atom located in group 2A and period 5?

1. 36 electrons
2. 38 electrons
3. 37 electrons

How many electrons are in the most likely ion formed from an atom located in group 6A and period 3?

1. 16 electrons
2. 17 electrons
3. 18 electrons

According to periodic trends, which metal has the highest ionization energy?

1. Li
2. Cs
3. Rb

Which nonradioactive group I metal would be the most reactive in water and why?

1. Cesium would be the most reactive group I metal in water because it has only one valence electron.
2. Cesium would be the most reactive group I metal in water because it’s one valence electron is the closest to the nucleus compared to the other metals.
3. Cesium would be the most reactive group I metal in water because it’s one valence electron is the farthest from the nucleus compared to the other metals.

Which of the following elements have a tendency to gain electrons?

1. Cl, O, F
2. N, O, Al
3. Cl, F, Ga

Which of the following is covalent compound?

1. CO
2. K₃PO₄
3. Na₂O

Which list of elements contains ONLY nonmetals?

1. helium, carbon, gold
2. sodium, chromium, copper
3. phosphorus, nitrogen, oxygen

Which of the following elements form +1 ions?

1. strontium, magnesium, calcium
2. lithium, sodium, potassium
3. sodium, magnesium, aluminum

1. How uranium is classified as an element?

1. Main group element
2. Transition metal
3. Inner transition metal

A molecule that has a single covalent bond is _____.

1. CO2
2. CO
3. Cl2

how many valence electrons does PO₄ ^3- has?

1. 29
2. 30
3. 31
4. 32

how many valence electrons does PO₄ ^3- has?

1. 29
2. 30
3. 31
4. 32

Which one of these compounds is an ionic compound?

1. Na2O
2. CO2
3. N2

According to periodic trends, which element is the most electronegative?

1. Ne
2. O
3. F

What is the electron group (EG) and molecular geometry (MG) of an ammonia molecule?

1. (EG) tetrahedral and (MG) tetrahedral
2. (EG) tetrahedral and (MG) trigonal pyramidal
3. (EG) tetrahedral and (MG) bent

Write the formulas of the following compound: silicon dioxide

1. SiO
2. Si2O
3. SiO2

Based off periodic trends, which of the following has the strongest lattice energy?

1. aluminum chloride
2. calcium chloride
3. Sodium chloride

How do the molecular geometry of the molecule IF5 and PF5 differ?

1. In IF5, there is a lone pair of electrons on iodine where as in PF5 there are no lone pairs on phosphorus. As a result, the molecular shape of IF5 is square pyramidal and PF5 is trigonal bipyramidal.
2. In PF5, there is a lone pair of electrons on phosphorus where as in IF5 there are no lone pairs on iodine. As a result, the molecular shape of PF5 is square pyramidal and IF5 is trigonal bipyramidal.
3. In IF5, there is a lone pair of electrons on iodine where as in PF5 there are no lone pairs on phosphorus. As a result, the molecular shape of IF5 is octahedral and PF5 is trigonal bipyramidal

What are the bond angle formed by the central atom P and two of the equatorial fluorine’s in the molecular geometry of PF5 ? trigonal bipyramidial

1. 90°
2. 120°
3. 5°

Using VSEPR theory, predict the electron group geometry, molecular shape, and the bond angles in a molecule that contains 4 electron groups (3 bonds and 1 lone pair electrons).

1. tetrahedral, trigonal pyramidal, >109.5°
2. tetrahedral, trigonal pyramidal, <109.5°
3. tetrahedral, trigonal pyramidal, 109.5°

Using VSEPR theory, predict the electron group geometry, molecular shape, and the bond angles in a molecule that contains 6 electron groups (5 bonds and 1 lone pair electrons).

1. octahedral, octahedral, 90°
2. octahedral, square planar, 90°
3. octahedral, square pyramidal, 90°

What are the bond angle in the molecular geometry of H2O?

1. 104.5°
2. 107°
3. 5°

What are the bond angle in the molecualre geomerty of CH4?

1. 5°
2. 107°
3. 5°

Write the formulas of the following compound: potassium phosphide

1. KP
2. K2P
3. K3P

According to the octet rule, a magnesium atom has a tendency to

1. lose one electron.
2. lose two electrons.
3. gain one electron

According to the octet rule, a bromine atom has a tendency to

1. lose one electron.
2. lose two electrons.
3. gain one electron

How many electrons are shared in a single covalent bond?

1. 2
2. 3
3. 1

A molecule that has a triple covalent bond is _____.

1. HCN
2. CO2
3. H2O

Which of the following diatomic molecules is joined by a double covalent bond?

1. Cl2
2. O2
3. N2

What’s the molecualr shape of BCl₃.

1. linear
2. bent
3. trigonal planar

What is the molecular shape of CO2?

1. linear
2. bent
3. trigonal planar

Which molecule has only covalent bonds?

1. CO2
2. Al2O3
3. Mg3N2

The octet rule states that main group elements in the periodic table react to achieve a filled valence shell which consists of how many electrons?

1. 2
2. 4
3. 8

Which of the following elements are found in the p-block and can form an octet?

1. He, P, S, As
2. P, S, O, C
3. He, Ar, Kr, Ne

Based off molecular polarity determined by VSEPR theory, which of the following would be insoluble in CCl4?

1. methanol CH₃OH
2. octane CH₃CH₂CH₂CH₂CH₂CH₂CH₂CH₃ non polar
3. hexane CH₃CH₂CH₂CH₂CH₂CH₃ nonpola

Based off molecular polarity determined by VSEPR theory, in which solvent would glucose be the least soluble?

1. CH3CH2OCH2CH3
2. CH3OH
3. H2O

Why are detergents and soaps good at cleaning up oily stains from dishes or clothing?

1. Detergents and soaps work well to clean up oily messes because they are amphiphilic in nature so they contain both hydrophilic (polar) and hydrophobic (nonpolar) ends. The hydrophobic end attaches to oils via hydrogen bonds creating micelles which leave the hydrophilic part exposed and can be washed away by water.
2. Detergents and soaps work well to clean up oily messes because they are amphiphilic in nature so they contain both hydrophilic (non-polar) and hydrophobic (polar) ends. The hydrophobic end attaches to oils via London forces creating micelles which leave the hydrophilic part exposed and can be washed away by water.

C. Detergents and soaps work well to clean up oily messes because they are amphiphilic in nature so they contain both hydrophilic (polar) and hydrophobic

Which of the following molecules has a voilation of octet rule?

1. NO₂
2. PF₅
3. BeCl₂
4. all the above

How many non-polar bonds does CH3OH contain?

1. 2
2. 3
3. 4