What is the correct electron configuration of chromium?

1s^2, 2s^2, 2p^6, 3s^2, 3p^6, 4s^1, 3d^5

What is the RFM of this molecule?

Lighter nuclei join to form a heavier one

How are the chemical properties of an element predicted?

The number of electrons in the incomplete shell

What is the electron pair repulsion principle?

Electrons arrange themselves to be as far apart as possible

Methane, Ammonia and Water all have 4 outer electron groups but all different bond angles. Why?

They have different BPtoLP ratio. LP repel+than BP electrons

studbud

OCR Chemistry Salters B A Level (2015-) Elements of Life

12 termsStudBud Administration209 plays

Flashcards12 cardsFPractice quizPHost liveL

Questions 12

Answers

1
What is the value of avogadro's constant ?
6.02x10^-23
6.02x10^-24
6.22x10^-23
6.20x10^-23
2
What is the correct electron configuration of chromium?
1s^2, 2s^2, 2p^6, 3s^2, 3p^6, 4s^2, 3d^4
1s^2, 2s^2, 2p^6, 3s^2, 3p^6, 4s^2, 3d^5
1s^2, 2s^2, 2p^6, 3s^2, 3p^6, 4s^1, 3d^5
1s^2, 2s^2, 2p^6, 3s^2, 3p^6, 3d^6
3
What is the RFM of this molecule?
Lighter nuclei join to form a heavier one
A heavier nuclei expels mass through alpha radiation
A nucleus gets heavier by itself and nothing happening to it
A heavier nuclei splits into smaller one
4
To write electron configuration of an anion do you...
Remove electrons
Keep it the same
Change the subshell
Add electrons
5
What shape does the P-orbital have?
Circle
Figure of 8
Square
Hexagonal
6
How are the chemical properties of an element predicted?
Number of electrons in the outer p- shell
The number of electrons in the incomplete shell
Total number of electrons in the atom
Number of electrons in the outer s- shell
7
Ionisation energy increases as you move across a period, this is because….
The number of neutrons increase
The number of neutrons decrease
The number of protons decrease
The number of protons increase
8
What wavelength has the lowest energy?
Gamma rays
Infrared
Ultraviolet
Visible light
9
What colour flame does Li+ have?
Green-blue
Orange
Red
Yellow
10
If RAM is relative to Carbon-12, what would be equal to the amount of particles in one mole?
1 molecule
1g of Carbon -12
1 atom
12g of Carbon-12
11
What is the electron pair repulsion principle?
Electrons arrange themselves to be as far apart as possible
Opposite charges attract
Electrons arrange themselves to be equal distances
Same charges repel
12
Methane, Ammonia and Water all have 4 outer electron groups but all different bond angles. Why?
They have different BPtoLP ratio. LP repel+than BP electrons
Bonding electrons repel more than lone electrons
They are different molecules
Element atom sizes are different

OCR Chemistry Salters B A Level (2015-) Elements of Life Flashcards | StudBud

OCR Chemistry Salters B A Level (2015-) Elements of Life

12 termsStudBud Administration209 plays

OCR Chemistry Salters B A Level (2015-) Elements of Life

Flashcards12 cardsFPractice quizPHost liveL

Questions 12

Answers

1
What is the value of avogadro's constant ?
6.02x10^-23
6.02x10^-24
6.22x10^-23
6.20x10^-23
2
What is the correct electron configuration of chromium?
1s^2, 2s^2, 2p^6, 3s^2, 3p^6, 4s^2, 3d^4
1s^2, 2s^2, 2p^6, 3s^2, 3p^6, 4s^2, 3d^5
1s^2, 2s^2, 2p^6, 3s^2, 3p^6, 4s^1, 3d^5
1s^2, 2s^2, 2p^6, 3s^2, 3p^6, 3d^6
3
What is the RFM of this molecule?
Lighter nuclei join to form a heavier one
A heavier nuclei expels mass through alpha radiation
A nucleus gets heavier by itself and nothing happening to it
A heavier nuclei splits into smaller one
4
To write electron configuration of an anion do you...
Remove electrons
Keep it the same
Change the subshell
Add electrons
5
What shape does the P-orbital have?
Circle
Figure of 8
Square
Hexagonal
6
How are the chemical properties of an element predicted?
Number of electrons in the outer p- shell
The number of electrons in the incomplete shell
Total number of electrons in the atom
Number of electrons in the outer s- shell
7
Ionisation energy increases as you move across a period, this is because….
The number of neutrons increase
The number of neutrons decrease
The number of protons decrease
The number of protons increase
8
What wavelength has the lowest energy?
Gamma rays
Infrared
Ultraviolet
Visible light
9
What colour flame does Li+ have?
Green-blue
Orange
Red
Yellow
10
If RAM is relative to Carbon-12, what would be equal to the amount of particles in one mole?
1 molecule
1g of Carbon -12
1 atom
12g of Carbon-12
11
What is the electron pair repulsion principle?
Electrons arrange themselves to be as far apart as possible
Opposite charges attract
Electrons arrange themselves to be equal distances
Same charges repel
12
Methane, Ammonia and Water all have 4 outer electron groups but all different bond angles. Why?
They have different BPtoLP ratio. LP repel+than BP electrons
Bonding electrons repel more than lone electrons
They are different molecules
Element atom sizes are different