Chem-Final 1

An isotope is the same element with a different mass

which scienist determined that you cannot know the velocity and position of the particle at the same time

what occurs when 2 compounds are put together but are not chemically combined

gaseous state of a substance is called

The atomic emission spectrum of an atom is the wavelenths that are produced when energy goes through an element

what is a pure substance that cannot be broken down into simpler substances

A brief statement or equation that summarizes a pattern in nature

A tested explanation of a set of hypotheses but cannot be proven absolutely

what type of radioactive decay occurs when the atomic number for an element goes up by 1 and atomic mass stays the same

The use of evidence to construct testable explanations and predictions

what type of radioactive decay occurs when the atomic number for an element goes down by 2 and atomic mass goes down 4

an object that has a definite volume but no definite shape

The factor that is deliberately changed

Which scientist discovered the electron

Which scientist believed electrons orbited the nucleuslike planets orbit the sun

What is a photon

Anything that has mass and takes up space

Which of the following is an SI unit for expressing the mass of a block of Au

which scientist wa sone of the first to suggest that electrons could act as both waves and particles

filtration seperates a heterogeonus mixture

what is the name of elements found in group 18

Who thought that empty space could not exist

which scientist is known as the father of the periodic table of elements

what type of element is brittle

which scientist made an equation that helps determine where the electron of an atom can be found

which scientist identified that atoms have a nucleus and the electrons are in empty space around the nucleus

A testable explanation of a situation

what are the columns an rows of the periodic table called

an object that has definite volume and shap

what is it called when there are 2 or more metals mixed together

who first used the term atom to describe matter

what law states that a compound is always composed of the same elements in the same proportions of mass

The factor that changes because of the independent variable

particles can move at high speeds

the particles have an ability to flow

what does a p orbital look like

what occurs when 2 elements are chemically combined

which orbital diagram rule states that all possible locations have to have one electron before a second one gets added

the particles can only vibrate in place

What is the fundamental unit of length in the metric system

what type of element is malleable

orbital diagram rule states-a maximum of 2 electrons can occupy a single orbital but only if they have opposite spins

Which scientist discovered the neutron

How many sig figs in 19.8030

which scientist thought that atoms were balls of positive that had negative particles in them

law-different compounds are formed a combo of same elements different masses of 1 element combine w/ fixed mass in ratio

A student takes 3 measurements and they are all close to eachother. What is the data considered to be

water boiling is an example of

what is the name of elements found in group 2

Matter that has definite and uniform composition

distillation seperates a heterogeonus mixture

The study of matter and the changes it undergoes

which scientist arranged elements in increasing atomic number

a gas that has been ionized

A cubic centimeter is equivalent to what other metric volume unit

how many valence electrons does the element tellurium (Te) have

A representation of an event that allows scientists to understand it better

how many valence elctrons does an element in group 5 have

who used cathode ray tubes to discover electrons

what is the name of elements found in group 1

what is the name of elements found in the d block of the periodic table

g/mL, m^3, and m/s are derived units

object has no definite shape or volume

Which scientist was the first to identify that elemental properties repeat in a specific manner

How many sig figs are in 0.020300