Chemistry Exam

Which of these is a qualitative observation

In order, How many protons, electrons, and neutrons does this isotope of Oxygen have? (18/8 O)

the orbital shape like a "dumbbell" is

which of the following elements has the largest atomic radius

The process used to find the volume in question number three called

What would be the density of a ten-gram object that displaces two-millimeters of water?

an equation is said to be balanced if it follows the Law of Conservation of Mass

A solid has a(n)____ shape and a(n)____ volume.

In an experiment, the variable which is deliberated changed by the scientist is called...

the starting substances ina chemical reaction are called

Would an 8 gram object with length of 4 cm, a width of 2 cm, and height of 2 centimeter, float, or sink in water

a molecule in which the central atom is bonded to four other atoms has which of the following shapes

the modern view of an atom has came a long way from that of a solid, indestructible sphere.

which of the following would describe the bond formed between magnesium and chlorine

what is the name of an atom that has lost electrons and what charge does it have

A few elements were out of place on Mendeleev periodic table. Name the scientist who put them in the right place

what is the strongest intermolecular force that exist among only polar molecules called

What is the electron distribution of fluorine, which has an atomic number of 9?

which of the following is NOT a physical property of the chair

Which of the following states that matter cannot be created or destroyed?

The lowest state of energy of an atom is called

what sublevel or sublevels are present in main energy level number 2?

The word "atom" comes from the Greek word "atomos" which means

What phase of matter is oxygen at room temp

Which of the following elements has the largest ionization energy

Mendeleev arranged the elements by increasing atomic

How many valence electrons does an atom of Oxygen have

which of the following would be classified as a chemical change?

How many energy levels does an atom of Oxygen have?

TRUE or FALSE: When a hypothesis is tested and shown to be incorrect, the experiment is a failure.

which of the following always combines in definite proportions

A molecule containing only 2 atoms has which of the following shapes

When 2 atoms share 3 pairs of electrons , the bond is called a :

Luster , Malleability and ductility are true for what type of bonding

how many valence electrons does an atom of Krypton have?

What is it about the elements in a column of the periodic table that makes them behave similarity?

Chemistry is the study of

Who is credited with the first atomic theory based on experiment evidence

An educated guess which explains observations is called

A graduated cylinder has 20.0 cm^3 of water in it when a marble is dropped in. The water level rises to 21.5 cm^3.

What identifies an element

All of the following are characteristics of ionic compounds except for:

An explanation of why observable facts and phenomena occur is called:

What is the formula for solving a density problem?

An atom is neutral because it has the same number of protons as it has:

Which of the following is NOT a symbol for an element

what is the term used to collectively describe protons and neutrons

A(n) ___ is made of two or more elements physically combined

a molecule in which the central atom is bonded to four other atoms has which of the following shape

How many shared pairs of electron are in ammonia, NH3

is oxygen a metal, nonmetal, or metalloid

What is it called when a solid turns directly into a gas?

What is it called when a liquid turns directly into a gas?

The instrument used to measure mass is the:

what is the basis for separating mixtures using a centrifuge?

Rutherfords Experiment led us to believe:

Which of the following is an example of a compound

An excited atom:

Which technique or property would be used to separate aluminum cans from steel cans?

when balancing a chemical equation one is allowed to adjust the

are electrons lost and gained during the formation of negatively charged ions

which of the following is an example of a heterogeneous mixture

what type of bond will form between N and O

TRUE or FALSE: When a hypothesis is tested and shown to be incorrect, the experiment is a failure.

What is it called when a liquid turns directly into a solid?

A compound that conducts electricity when dissolved in water would most likely be classified as:

which of the following elements has the largest electron affinity

The instrument used to measure liquid volume is the :

What particles are responsible for nearly all the mass of the atom

In an experiment, the variable resulting from the deliberately changed variable is called:

A(n)____ is made of two or more elements chemically combined.

in an ionic compound , the chemical formula represents