Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Elements Of Life > EL1 Where Do Chemical Elements Come From? > Flashcards

EL1 Where Do Chemical Elements Come From? Flashcards

1
Q

What is the mass of an electron?

A

0.000 55

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is the mass of a proton and neutron?

A

1

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Describe the simple model of the atom?

A

Protons and neutrons in the nucleus, electrons move around the nucleus, the nucleus is tiny compared to the volume occupied by electrons, and most of the atom is empty space.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is the atomic number?

A

The number of protons in the nucleus.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is the mass number?

A

The number of protons and neutrons in the nucleus.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What part in an atom interacts in chemical reactions?

A

The electrons.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is the atomic number equal to in an atom?

A

The nuclear charge of the nucleus.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is the same for every atom of the same element?

A

The atomic number.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What are isotopes?

A

Atoms of the same element that have different mass numbers caused by different numbers of neutrons.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is the relative atomic mass an average of?

A

The relative isotopic masses.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is mass spectrometry?

A

A technique used to find the atomic mass of elements and compounds.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is the relative isotopic mass?

A

The mass of an atom of an isotope.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Is the relative isotopic mass or relative atomic mass written as a whole number?

A

The relative isotopic mass.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What does mass spectrometry measure?

A

The atomic mass of different particles, and the relative abundance of different isotopes in an element.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What happens in a mass spectrometer?

A

A sample of atoms are ionised to positively charged cations which are then separated according to their mass and detected with their abundance.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is the equation for relative atomic mass?

A

(relative isotopic massrelative abundance)+(rim2ra2)/ all over 100.

17
Q

What happens in nuclear fusion?

A

Two light atomic nuclei fuse together forming a single heavier nucleus of a new element, releasing enormous amounts of energy.

18
Q

What must nuclei do to fuse together?

A

They must come very close.

19
Q

Why can nuclear fusion only occur in stars like the sun?

A

The temperature is very high so nuclei collide at high speeds with lots of energy, and this overcomes the strong forces of repulsion between the positive nuclei.

20
Q

What must balance in a nuclear equation?

A

The atomic and mass numbers.

21
Q

What is the nuclear equation for hydrogen?

A

H+H–>He (with mass and atomic numbers).

Elements Of Life (12 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions