4-1 Modeling Atoms (Lecture 1)

what is an atom?

smallest particle of element

what charge does proton have?

positive

what charge does neutron have?

no charge

what charge does electron have?

negative charge

protons, neutrons, and electrons are all called..

subatomic particles

what subatomic particle has no mass?

electrons

what is the nucleus?

core of atom

what is the nucleus made up of?

protons and neutrons

what is an element?

simplest form of matter with unique properties

the number of protons is also called…

atomic number

what is the atomic number of helium?

2

what is the atomic number of silver?

47

what is the amu for an electron? (in scientific notation)

5x(10^-4)

what is the atomic number of fluorine?

9

what is the atomic number of iodine?

53

how many elements are in the periodic table?

118

what is group in periodic table?

column

all elements in the same ____ have the same ___

group, chemical properties

what is the mas number for neon?

22

what is the atomic number for neon?

10

what is the atomic number of sodium?

11

what is the atomic number of sulfur?

16

what is the atomic number of silver?

47

what is the atomic number of gold?

79

isotopes have the same amount of… but have a different amount of…

protons, neutrons

what is the atomic number of oxygen?

8

1 amu is equal to … of a(n) …. atom

1/12, carbon-12

what color represents smallest “fall“ of an electron

red

what color represents the largest “fall”/energy release of an electron?

violet

what two things should you do after you are finished studying these flashcards?

practice significant figures and scientific notation, practice calculating average atomic mass

what is the formula for energy of a photon?

plank constant x frequency

what is the value of speed of light?

3.00 × 10^8 m/s

visible spectrum ranges from ____ to ____ (shortest to longest wavelength), and corresponding colors are ___ and ____

400 nm, 700 nm, violet, red