Chemistry Midterm 2016

The ozone layer is mostly located in the stratosphere

Matter that has a uniform and unchanging composition is known as a(n) ____.

Ppl hypothesized tht CFCs in atmosphere r depleting the ozone. Their work is applied research

Milk is a homogeneous mixture

Which is an intensive physical property?

Which has a charge of +2 and a mass # of 4?

Which scientist measured the charge on an electron as 1.602 x 10-19 Columbs?

Qualitative measurements involves numbers while quantitative measurements records descriptions

Described an atom made of a solid positively charged substance w electrons dispersed throout it

Which term is described as the amount of matter in an object?

Gamma radiation is a form of nuclear radiation that consists entirely of energy, not matter

According to the modern concept of the atom, which r located in the nucleus of an atom?

Concept that matter was composed of tiny invisible subatomic particles was originally given by

Which is the state of matter that has an indefinite shape and a definite volume?

Which is a quantitative measurement?

The volume of a ballon increases as it's heated. The volume is the dependent variable

Mass is defined as anything that can be observed

Isotopes are forms of an element that have the same # of protons but different # of electrons

8.00g of aluminum reacts w/ oxygen to form 15.20g of aluminum oxide how many g of oxide r used

The control is the part of the experiment that the other results will be compared to

Democritus believed that matter is made up of tiny individual particles known as a(n)

Which is a qualitative measurement?

James Chadwick showed that the nucleus also contained a neutral subatomic particle known as a/n

Which one(s) have a mass of 1 amu?

Uranium is a naturally occurring element tht emits particles&rays spontaneously process called

How many significant digits are in the value 0.0050340?

Seawater is a substance

When reading a measurement scale, record every value that is known for certain but no more

In most line graphs, the dependent variable is placed along the x-axis

How many significant digits are in the value 530,405,000?

How many electrons are in Chlorine-36 (neutral atom)?

An alpha particle is ____ charged w two protons and neutrons

Which unit is determined by the frequency of radiation given off by Cesium-133?

Radioactive decay can change one element into another one

Separation technique that relies on the different boiling points of the parts of the mixture

A cathode ray tube consists of a stream of protons

Which is not a chemical change?

Earth attracts all objects to its surface. This statement is a(n) ____.

A substance is a matter that has a definite end uniform composition

Organic chemistry involves the study of substances that contain oxygen

A chemical change is always accompanied by one or more physical changes

Which value has only four significant digits?

Which is a compound?

Which is an example of a homogeneous mixture?

The mass of an astronaut remains the same on Earth and the Moon

If the temp of water increases as u heat it, the temp is the independent variable

Which is true of Earth's atmosphere?

Which is the smallest particle of an element that retains all the properties of the element?

Protons in and atom is called the ___ of the element

A solid cannot be compressed because it's particles are tightly packed

Which of the following properties of matter can be explained on a submicroscopic level?

And intensive physical property is one that depends on the amount of matter present

Which is the state of matter that has an indefinite shape and in definite volume?

What is the distance that light travels through a vacuum in 1/299 792 458 of a second?

Subatomic particle that has mass nearly equal to a proton, but carries no electrical charge

Researchers discovered a subatomic particle while working w the cathode ray tube, called _____.

Which is a chemical property of copper?

A beta particle consists of a fast moving electron and has a(n) ___ charge

Which is the part of an experiment that serves as the point of comparison for the results?

Aristotle was the first to say that all matter is made up of atoms

A change in state of matter is a physical change

Chlorofluorocarbons are made in the atmosphere by the reaction of ozone w/ ultraviolet light

Which is not an appropriate unit for measuring density?

Atoms w the same number of protons but different number of neutrons

The agreement among the numerical values of a set of measurements is defining..

Will we pass this midterm??

law of _ states that a compound is always comp of the sam elements inthe sam proportion by mass

And object has the same weight regardless of its location on Earth

Which is an extensive physical property?

Which of the following substances is an element?

Steps of the scientific method must be done in order every time an experiment is carried out

Which is not a harmful result of UVB exposure?

The mass of a neutron is approx equal to the mass of a proton

Which is the correct value for the prefix deci-?

Greek philosophers thought that matter was composed of four elements: air earth fire & water

In a neutral Adam, the number of protons is equal to the number of neutrons

Which of the following appliances increase CFCs in the atmosphere?

Which of the following substances is a mixture?

CFCs do not pose a threat to the environment because they are stable

An alpha particle is the equivalent of a Helium-4 nucleus

Which is the state of matter that has a definite shape and a definite volume?

Chemical comp of 2or more diff elements joined together in a fixed proportion is known as a(n)

Which of the following about chlorofluorocarbons is true?

What a chemical change occurs, the products have a greater mass than the reactants

When moving from a small unit to a larger unit the numerical value will increase

Which describes what happens when you fly 10 KM above the Earth's surface?

A base unit is made up of several other units combined together

Chemistry is the study of matter and the changes it goes through

How many neutrons are in an atom of Sodium-23?

Orange juice is a heterogeneous mixture

A luminous flame on a Bunsen burner..

Which is the value associated with the prefix nano-?

According to the law of conservation of mass, in any chemical change