Monatomic = “mono” + “atomic”” “mono” = one

Slides:

Advertisements

Similar presentations

Magnesium is Mg. Mn is manganese.

Advertisements

The term valence refers to the outermost shell.

QUESTION: A 25.0 gram sample of a compound is found to be 24% chlorine by mass. What is the percentage of chlorine in a 50.0 g sample of the compound?

QUESTION: Which of the following elements is a post-transition metal? A. silicon, B. lead, C. sodium, D. chromium SCRIPT: Which of the following.

For which pair of molecules is London Dispersion strongest?

Na: 11 electrons, Na+: 10 electrons

How to tell from the formula if a compound is ionic:

To construct the ground state electron configuration,

Mass of proton : x kg, or u QUESTION: Which of the following has the largest total mass? A. 2 protons + 4 electrons B. 2 neutrons.

QUESTION: Which of the following elements is a transition metal? A. silicon, B. lead, C. sodium, D. chromium SCRIPT: Which of the following elements.

The number of dots = number of valence electrons

How to tell from the name if a compound is ionic:

SO3: one Sulfur atom: 16 protons

QUESTION: Which atom’s first five ionization energies best resembles the pattern shown in the graph? A. Na, B. Mg, C. Al, D. K First ionization.

Which of these is the formula of a reactant in this reaction?

Therefore the correct answer is D.

Which of the following has the largest size? A. K, B. K+, C. Se, D. Li

Ions are formed by loss or gain of electrons.

QUESTION: Which of the following describes an anion? A. a sodium ion (Na+), B. a calcium ion that has lost 2 electrons C. an ion with 8 protons and 10.

QUESTION: Which of the following is a metalloid? A. Potassium, B. Silicon, C. Iron, D. Helium SCRIPT: Which of the following is a metalloid? A.

In nature, substances are typically mixed.

Mass of proton or neutron: 1.0 u Mass of electron: u

Trends in atomic size: opposite of trend in ionization energy

CLICK Here are some possible molecular formulas When x=1, we have NO2.

QUESTION: Which of the following elements is the best electrical conductor? A. carbon, B. germanium, C. manganese, D. iodine SCRIPT: A. carbon,

QUESTION: Which of the following has the highest electronegativity? A. Na, B. Br, C. F Electronegativity is a measure of the tendency of an atom to.

Ions are formed by loss or gain of electrons.

Ammonium sulfide is an ionic compound. Cation is ammonium ion. NH4+

QUESTION: Which of the following elements is a metal that belongs to a main group or representative group? A. magnesium, B. zinc, C. sulfur, D.

Since both carbon and oxygen are nonmetals, choice C is wrong.

Diatomic = “di” + “atomic” “di” = Greek prefix; means “two”

There are 3 orbitals in a p subshell (ml = -1, 0, or +1).

Ions are formed by loss or gain of electrons.

Which of the following has the largest size? A. Cl B. Cl-, C. F, D. F-

QUESTION: How many atoms in the acetic acid molecule (CH3COOH) are capable of hydrogen bonding interaction with water molecules? A. 1, B. 2, C. 3, D.

QUESTION: Which type of element has the lowest electronegativity? A. a metal, B. a nonmetal, C. a metalloid Electronegativity is a measure of the.

Mathematically, this implies that the ratio of the amount of element

QUESTION: What is the electron configuration of Fe3+? A. [Ar] 4s2 3d6 B. [Ar] 4s2 3d3 C. [Ar] 4s1 3d4 D. [Ar] 3d5 SCRIPT: What is the electron configuration.

How many neutrons does an O-18 atom have? A. 8, B. 10, C. 16, D. 18

One Na+ ion: +1 One CO32- ion: -2

QUESTION: What is the electron configuration of naturally occurring aluminum ion? A. [Ne] 3s2 3p1, B. [Ne] 3s2 C. [Ne] 3s1, D. [Ne] The.

QUESTION: How should the result of the following calculation be reported, assuming that 1.8 and 32 are exact numbers? 32 + (1.8)(2.37) A. 36,

Cobalt(II) chloride is an ionic compound. Therefore:

What is the Kelvin temperature equivalent to 50.00oF?

2. A molecule with no polar bonds is nonpolar.

QUESTION: Assume circles and squares in the figures below represent atoms. According Dalton’s atomic theory, which of the figures below best represents.

The oxygen-to-carbon ratio in that sample is x over 36.0 HIGHLIGHT

What is the Kelvin temperature equivalent to 25.00oC?

The simplest collection of ions with a total charge of zero would be….

Na2S is a binary, ionic compound. Binary: two elements (Na and S)

We can look up isotopic abundance for Mg and find:

A. air, B. gasoline, C. copper wire

Trends in ionization energy:

Allowed values of principal quantum number (n): positive integers

Valence electrons: Cl – 7, O – 6, C – 4, N – 5

Oxoanions have names ending in “ate” or “ite”

Therefore, the correct answer is A.

The area of a circle is found to be 2.4 cm2. What is the area in m2?

Trend across a given period: increasing (with a few exceptions).

Iron(III) sulfide is an ionic compound. Therefore:

QUESTION: A sample of matter is heated and found to start melting at 75.0oC. While melting, the sample temperature continues to rise to about 85.0oC.

Ions are formed by loss or gain of electrons.

For which pair of molecules does dipole-dipole interaction occur?

CLICK PAUSE END RECORDING

A. an element and two compounds, B. two elements and a compound,

QUESTION: Which of the structures below is valid for the HOCl molecule? A. 1, B. 2, C. 3, D v.e. 12 v.e. 10 v.e. SCRIPT: Which of the structures.

0.800 m has three significant digits

What do molecules and polyatomic ions have in common?

80.00 g has four significant digits

Mole is a group count (just like dozen).

Presentation transcript:

Monatomic = “mono” + “atomic”” “mono” = one QUESTION: Which of these naturally occurs as a monatomic gas under ordinary conditions? A. helium, B. sodium, C. oxygen, D. nitrogen Monatomic = “mono” + “atomic”” “mono” = one Monatomic gas: atoms are not bonded to other atoms. Noble gases : He – helium, Ne – neon, Ar – argon Kr – krypton, Xe – xenon, Rn - radon SCRIPT: Which of these naturally occurs as a monatomic gas under ordinary conditions? A. helium, B. sodium, C. oxygen, D. nitrogen PAUSE The term monatomic comes form the greek prefix mono and atomic. CLICK Mono means one. A monatomic gas is just a collection of individual atoms,… atoms that are not attached to other atoms. CLICK The family of elements that fit this description is known as the noble gases. CLICK Members of this family include helium, neon, argon, krypton, xenon, and radon. CLICK Therefore, the correct answer is A. Among the choices given, only helium is a noble gas. CONTINUED ON NEXT SLIDE

You will find the noble gases in rightmost colum of the periodic table --- column 18. This family or group of elements is often referred to as as group 8A, or group zero. CONTINUED ON NEXT SLIDE

You will find the noble gases in column 18 of the periodic table. This family or group of elements is often referred to as as group 8A, or group zero. Here’s helium… CLICK neon… argon… Krypton CLICK Xenon And Radon PAUSE END RECORDING

Video ID: 1-7-2 © 2008, Project VALUE (Video Assessment Library for Undergraduate Education), Department of Physical Sciences Nicholls State University Author: Glenn V. Lo Narrator: Funded by Louisiana Board of Regents Contract No. LA-DL-SELECT-13-07/08