chemistry 2023

there are two isotopes of uranium. There is Uranium- 235 and uranium-238 which isotope is more abundant

mass number = sum of ? and ?

how much does sodium weigh in grams ?

when counting subatomic particles, what does the atomic number tell you? Number of ?

molar mass= mass in ?

electromagnetic radiation is a form of energy that exhibits ? behavior as it travels through ?

measurments are made to ? ? beyond where the measuring device is marked

waht is the molar mass of Na2S

? depend on the amount of matter that is present

how many sig figs are in 0.17g

a mol is the ? that contains as many particles as there are atoms in exactly 12 g of carbon 12

sig figs = all ? digits and One ? digit

what does the number 91 represent in the name zicronium- 91 ?

isotopes: atoms with the same number of protons, but ?

A ? exponent represents a number that is greater than one

matter is anything that has ? and ?

what is the first thing you should do when you notice a piece of glassware is broken

how many sig figs 0.03055

energy ? further from the nucleus

? do not depend on the amount of matter present

what is avogadros number

What is the equation for calculating density

a hypothesis must be

to find the number of neutrons you subtract the ? from the ?

science vs technology. Choose and example of technology.

what is the unit for average atomic mass

true or false. All spills should be cleaned up immediately, even if it is water

when using the hyphen notation you spell out the element name and put the ? number after the hyphen

? smallest unit of an element that retains the properties of that element

materials procedures are

chemistry is a ? science

only ? variable is tested during the experiment

A ? exponent represents a number that is less than one

what happens to the particles of a substance when their temperature is increased

the density of silver is 10.5 g/cm3. what is the mass of a sample of silver that is 14.5cm3?

the study of the structure and properties of the matter, the ? and the energy change associated with these changes

if wavelength decreases, frequency ?

what 3 things in the lab tell us we should wear safety goggles

which of the following mixtures is homogeneous

all elements are assigned mass relative to ?

? of electromagnetic radiation form the electromagnetic spectrum