2.2 Atoms, Ions And Compounds

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Total cards: 24•Content version: v4•Public deck•Updated: 8/1/2026

Card preview (24)

Front (Question)

Atomic Number

Back (Answer)

Number of protons in the nucleus of an atom.

Front (Question)

Mass Number

Back (Answer)

Number of protons and neutrons in nucleus that form mass of an atom.

Front (Question)

Electron

Back (Answer)

Subatomic particle with charge of -1 and mass of 1/1836 that occupies shells around nucleus.

Front (Question)

Proton

Back (Answer)

Subatomic particle with charge of +1 and mass of 1 found in nucleus of an atom.

Front (Question)

Neutron

Back (Answer)

Subatomic particle with charge of 0 and mass of 1 found in nucleus of an atom.

Front (Question)

Ion

Back (Answer)

A charged atom where number of electrons is different from number of protons.

Front (Question)

Isotope

Back (Answer)

Atom with same number of protons and electrons but different number of neutrons in the nucleus.

Front (Question)

Relative Atomic Mass

Back (Answer)

Weighted mean mass of an atom of an element compared to 1/12 mass of carbon-12.

Front (Question)

Relative Isotopic Mass

Back (Answer)

Weighted mass of an atom of an isotope when compared to that of 1/12 of an atom of carbon-12.

#10

Front (Question)

Formula of relative atomic mass

Back (Answer)

(% abundance x mass)+(%abundance x mass) /100

#11

Front (Question)

Cation

Back (Answer)

Atoms with fewer electrons than protons. Have an overall positive charge.

#12

Front (Question)

Anion

Back (Answer)

Atoms with more electrons than protons. Have an overall negative charge

#13

Front (Question)

Uses of mass spectrometer

Back (Answer)

-Monitoring breath of patients during surgery. -Detecting banned substances in athletics. -Analysing molecules in space.

#14

Front (Question)

How do mass spectrometers works

Back (Answer)

1) Sample placed in mass spectrometer. 2) Vaporised then ionised. 3) Ions are accelerated by electromagnetic plate. 4) Ions are detected with (m/z)mass to charge ratio. Larger abundance= larger the signal.

#15

Front (Question)

Ionisation in mass spectrometer.

Back (Answer)

Electron from electron gun knocks electron from substance,producing a cation. M+e = M+ + 2e-

#16

Front (Question)

Acceleration in mass spectrometer

Back (Answer)

Negative plate attracts positive ion making the ion accelerate to bend round corner.

#17

Front (Question)

Deflection in mass spectrometer

Back (Answer)

Uses magnetic field. Higher the mass= stronger magnetic field needed to reach the detector.

#18

Front (Question)

Detection in mass spectrometer

Back (Answer)

Masses are determined for each ion by signal each ion produces by mass to charge ratio. Higher abundance=larger signal

#19

Front (Question)

What do peaks on mass spectra show?

Back (Answer)

Number of isotopes

#20

Front (Question)

What do the height of the peaks show in a mass spectra?

Back (Answer)

Abundance of each isotope.

#21

Front (Question)

What are binary compounds ?

Back (Answer)

Compounds that contain 2 elements only. In ionic compounds, metal ion always comes first.

#22

Front (Question)

What are polyatomic ions?

Back (Answer)

Ions that contain atoms of more than one element bonded together. Eg. NO3-, SO4 3+

#23

Front (Question)

What do some elements exist as?

Back (Answer)

Diatomic molecules containing 2 atoms bonded together. Eg. O2 H2 Cl2

#24

Front (Question)

What are covalent compounds ?

Back (Answer)

Exist as molecules with small number of atoms bonded together, that share pairs of electrons. They do not contain ions. Eg. CO2, H20