Test
Atomic Structure
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Preguntas del test (22)
1What are protons and neutrons both considered to be?
- Adiscrete particles
- Bnegative
- Clarge
2What do electrons exhibit?
- AWave-particle duality
- Bspeed
- Cdistance
3what is the name of the force that holds electrons in their shells?
- Aelectrostatic force of attraction
- Brepulsion
- Cstrong attraction
4What is the Aufbau principal?
- Aelectrons will occupy the lowest available energy levels
- Belectrons will remain unpaired in the same sublevel where possible
- Cpositive protons are attracted to a negative charge
5the sublevels go up by S, SP, SPD,SPDF
- AVerdadero
- BFalso
6What happens to the sublevel 4s?
- Ait fills before 3d
- Bhas more pairs than 3d
- Cit fills after 3d
7What is the electronic configuration of Oxygen (atomic number 8)?
- A1s2. 2s2, 2p6
- B1s2,2s2,2p4
- C1s2,2s2,2p3
8What is the electronic configuration of neon (atomic number 10)
- A1s2.2s2,2p6
- B1s2,2s2,2p6,3s2
- C1s2,2s2,2p4
9What is the definition of ionisation energies?
- Aenergy required to remove one mole of electrons from 1 mole of gaseous atoms
- Benergy required for an electron to turn into an ion
- Cenergy need for ionisation
10What are the four factors that affect ionisation energy?
- Adistance from nucleus, number of protons, shielding, paired electrons
- Bnumber of protons, distance from nucleus, number of electrons, paired electrons
- Cnumber of electrons, paired electrons, number of shells, distance from nucleus
11The distance from the nucleus affects ionisation energy as the further away from the nucleus the [blank_start]weaker[blank_end] the force of attraction.
- Aweaker
12How does 'number of protons' affect the ionisation energy?
- Amore protons means more positive charge pulling on the electrons
- Bmore protons means that the ionisation energy will decrease
- Cless protons means less space
13How does the 'shielding' affect the ionisation energy?
- AThe more shielded, the less likely it is that the protons and electrons can escape
- BFull shells of electrons between the nucleus and the outer shell reduce the attraction of the protons and outer electrons. The more shielded an atom is the higher the ionisation energy
- CFull shells of electrons between the nucleus and the outer shell reduce the attraction of the protons and outer electrons. The more shielded an atom is, the lower the ionisation energy
14How does 'paired electrons' affect ionisation energy?
- AThey're harder to remove with the same sub-level than unpaired electrons
- BThey're easier to remove within the same sub-level than unpaired electrons
- CThe more pairs of electrons the higher the ionisation energy
15What is the definition of the term 'isotopes'?
- AIsotopes are atoms of the same element with the same number of protons but different number of neutrons
- BIsotopes are atoms of the same element with a different number of protons and electrons but the same amount of neutrons
- CIons that have the same electronic configuration
16What are the four steps to the Time of Flight Mass Spectrometer?
- AIonisation, acceleration, drift region, detection
- BAcceleration, drift region, detection, ionisation
- Cdetection, ionisation, drift region, acceleration
17What happens in the first stage (IONISATION) in the Time of Flight Mass Spectrometer?
- AThe sample is bombarded by high energy electrons from an electron gun
- BThe sample is bombarded by low energy electrons
- CThe sample is bombarded by high energy neutrons
18What happens in stage two (ACCELERATION) in the Time of Flight Mass Spectrometer?
- AThere is a high negative voltage applied outside the ionisation chamber, attracting the positive ions but repels the likelihood of further ionisation
- BElectrons gain energy causing them to move
- CElectrons lose protons causing them to accelerate
19What happens in stage three (DRIFT REGION) in the Time of Flight Mass Spectrometer?
- AIons with different masses hit the detector at different times. The greater the mass the lower the velocity and vice versa
- BHow many electrons lost or gained are detected
- CIons drift away
20What is the definition of Relative Atomic Mass (Ar)?
- AThe average mass of an atom of an element divided by 1/12 mass of an atom of 12C
- BHow heavy an electron is
- CHow protons weigh out the neutrons in an element
21Why is 12C used in relative atomic mass?
- AIt is the agreed standard
- BBecause all elements contain small percentages of carbon
22What is the definition of Relative Molecular Mass (Mr)?
- AAverage mass of a molecule divided by 1/12 of an atom of 12C
- BHow many moles make up the mass of an electron
- CHow many molecules in an element
Información
- Descripción
- AS - Level (Atomic structure) Chemistry Test sobre Atomic Structure, creado por megsnatashax el 07/10/2015.
- Autor
- megsnatashax
- Idioma
- English
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- 3
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