next step peroidc trend mcat

Question 1

what is matter composed of ?

Answer 1

matter is composed of atoms which in turns out is composed of subatomic particles

Question 2

Subatomic particles are composed of what

Answer 2

protons that have a +1E charge
neutrons are uncharged and have a mass of approximately 1 amu

electrons which are nearly massless and have a charge of 1E

Question 3

What is the atomic number

Answer 3

the atomic number Z is the number of protons in an atom which determine the chemical identiy

Question 4

what is the mass number of and atom?

Answer 4

The number of protons and neutrons of atom

Question 5

atoms of the same element with a different number of neutrons are known as what ?

Answer 5

ISOTOPES

Question 6

What did Bohr models stated

Answer 6

Bohr models stated elctrons orbit the nucleus the spehrical shell

When energy is aborbed electrons can jump to a higher energy level farther from the nucleus

when energy is released/ emitted : elctrons fall from higher to lower- energy level closer to nucleus

Question 7

When energy is aborbed in the atom electrons________________ and when energy is released electrons _____________

Answer 7

when energy is aborbed electrons can jump to higher energy levels farther from nuclus

when energy is released / emitted electrons fall from higher to lower eergy levels clossser to nucless

Question 8

List and explain what are the 4 quantum numbers

Answer 8

4 quantum numbers are n,l ml,and ms

n= principal quantum number denotes size of electron

l=azimuthal number denotes shape and subshell identity s,p,d,f

m l = magnetic quantum number : denotes orbital within and subshell orientation

ms= describe angular momentum /spin (+ 1/2 or -1/2)

Question 9

___________________ no two electrons in the same atom can have same set of 4 quantum numbers

Answer 9

palui exclusion principle

Question 10

___________ lower energy orbital fill first

Answer 10

Aufbai principle lower energy obritals fill first with the e xceptions of Cr , Cu and other element

Question 11

_________________ with in the subshell each orbital fill with one electron before any fill with a second

Answer 11

Hunds rule

Question 12

_________ rows _____________colums

Answer 12

perods = rows and groups = columns

elements in same group share properties

Question 13

_______ increases moving down and to the left along the table

____, and ____ and ____ increase moving up and to the right

Answer 13

atomic radius increase moving down and to the left along the table

ionization energy , electron affinity and electronegativey increases moving up and to the right

Question 14

2.) What is the actual charge of a proton and electrons?

Answer 14

The actual charge of single proton and electron is 1.6 x 10^-19 Columbs
A magnitude termend an elementary charge
electrons equal to 1.6 x 10^-19

Question 15

All atoms must contain what to become a atom

Answer 15

protom

Question 16

1 amu equals to what

Answer 16

1 g/ mol