P1 hwk due 16/6/23

Question 1

describe daltons model of the atom

Answer 1

solid invisible sphere

Question 2

describe Thomson’s model of the atom

Answer 2

spheres of positive charge with negative electrons spaced throughout

Question 3

give three conclusions of Rutherford gold foil experiment

Answer 3

most of the atom is made up of empty space
the nucleus is positive
the nucleus is small and densely packed

Question 4

describe how Bohr added to the nuclear model of the atom

Answer 4

he added the idea that electrons orbit the nucleus in shells

Question 5

give the typical side of an atom in meters

Answer 5

1 x 10^-10

Question 6

recall the equation for calculating density

Answer 6

mass/volume

Question 7

give the definition of mass

Answer 7

amount of matter an object contains

Question 8

give the definition of an atom

Answer 8

the smallest part of an element that can exist

Question 9

give the definition of the term molecule

Answer 9

a collection of two or more atoms held together by chemical bonds

Question 10

name the three subatomic particles

Answer 10

proton neutron electrons