Honors Chemistry Midterm

A prospector has 39.39g of pure gold (atomic mass 196.9665 amu.) she has

Which of the following observations is quantitative?

The density of pure diamond is 3.5 g/cm ^3

If electromagnetic radiationA has a lower frequency than erB,compared to B,the wavelength of A

The periodic law allows some properties of an element to be predicted base on its

The major difference between a 1s orbital and a 2s orbital is that

3 samples of 1.12g, 18.8g, and 1.562g are mixed together.What would the mass be with sig fig

A volume of 1 millimeter is equivalent to

The density of aluminum is 2.70g/cm^3

The element with electron configuration 1s^2 2s^2 2p^6 3s^2 3p^2 is

The region outside the nucleus where an electron can most probably be found is the

Argon, krypton, and xenon are

The electrons involved in the formation of a chemical bond are called

A 3-d region around a nucleus where an electron may be found is called a(n)

The emission of electrons from metals that have absorbed photons is called the

The Bohr model of the atom was an attempt to explain hydrogen's

Name the compound Fe(NO3)2

All isotopes of hydrogen contain

A homogeneous mixture is also called

Groups 13 through 18,the total # of electrons in the highest occupied level equals the group #

The set of orbitals that are dumbbell shaped and directed along the x,y, and z are all called

Technological development often occurs

The number of atoms in 1 mol of carbon is

If repeated measurements agree closely but differ widely from the accepted value, the mes. are

How is the measurement 0.000065 cm written in scientific notation?

What is the formula for aluminum sulfate?

Dalton incorporated the law of conservation of mass into his atomic theory by asserting that

The symbols for units of length in order from largest to smallest are

Protons within a nucleus are attracted to each other by

Isotopes are atoms of the same element that have different

Avogadro's number is

VSEPR theory is a model for predicting

The most reactive group of the nonmetals is the

A molecule of F, 2 shared electrons give each atom how many electrons in the outermost lev.

A sample of tin (atomic mass 118.71 amu) contains 3.01 x 10^23 atoms. The mass of the sample is

Which of the following is an example of a heterogeneous mixture

Which of the following is an extensive property of matter?

How many electrons are needed to completely fill the fourth energy level?

What is the oxidation number if oxygen in most compounds?

Visible light, X rays, inferred radiation, and radio waves all have the same

0.25 g is equivalent to

Chlorine has atomic number 17 and mass number 35. It has

If electron in an atom have the lowest possible energies, the atom is in the

Organic chemistry is the study of

In Rutherford's experience, most of the particles

Mendeleev predicted that the spaces in his periodic table represented

Basic research is usually performed

electrical current passed though glass tube cause the surface across from the cathode to glow..

N's econfig is 1s^2 2s^2 2p^3. How many more electrons does N need to satisfy the octet rule.

Name the compound N2O3

What happens to the energy in a substance when it changes state?

An atom is

Use VESPR theory to predict the shape of carbon dioxide, CO2

A chemical change occurs when

A neutral group of atoms held together by covalent bond is a

The horizontal rows on the periodic table are called

Which of the following is not a chemical change?

The average atomic mass of an element is the average of the atomic masses of its

Which of these measurements has only nonsignificant zeros?

What is the percentage composition of CO?

What is the formula mass of magnesium chloride, MgCl2?

The measurement 0.035550 g rounded off to two sig figs would be

To draw. Lewis Structure, one must know the

Use VESPR theory to predict the shape of the carbon tetraIODIDE molecule, CI4

A nonmetal is usually

Most of the volume of an atom is occupied by the

Elements to the right side of the p.t. (p-block elements) have properties most associated with

How many extra electrons are in the Lewis structure of the phosphate ion, PO4^3-

A compound is

Within the p-block elements, the elements the top of the able,compared with those at the bottom

Noble gases are in Group 18, and are best known because they are

Dimensions of a rectangular solid are measured to be 1.27cm,1.3cm,2.5cm. The volume should be

The number of orientations for the d sublevel is

Bromine atomic # 35, (group 17) .How many electrons does Br have its outermost energy level?

the mass of products when a chem. reac. was carried out 3separate times8:83g; 8:84g;8.82g mass=

The 1st member of the noble gases, whose highest energy lev. has an octet of electrons is

As it travels through space, electromagnetic radiation

over time it is indicated that a better arrangement than atomic mass for elements inthe p.t. is

In Period 3 there are 8 elements. What sub level(s) is (are) being filled?

Dalton's atomic theory agrees with modern atomic theory except for the statement that

Accord.to the Bohr model of the atom,the single electron of a hydrogen atom circles the nucleus

The electron notation for aluminum (atomic number) is

A theory is accepted as the explanation of an observed phenomenon until