Flashcards
Additional Science Chemistry C4 Revision Summary - OCR 21st Century
Flashcards do conjunto (17)
- 1What does the nucleus of an atom contain?Protons and Neutrons
- 2What is the relative mass and charge of a neutron?Relative mass: 1
Charge: 0 - 3Write the state symbols for each physical stateSolid - s
Gas - g
Liquid - l
Dissolved in water - aq - 4Describe how heating a metal can help identify itBy heating up a metal can help identify it as Lithium (Li) turns into a red flame, Sodium (Na) turns into a yellow/orange flame and finally Potassium turns into a lilac/purple flame
- 5Why does each element produce a different line spectrum?Each element produces a different line spectrum as different elements emits different wavelengths of light, which is due to each element having different electron arrangements. This means that each element has different pattern of wavelengths as well as different line spectrum
- 6What can line spectrums be used for?Line spectrums can be used to discover new elements, for example caesium and rubidium were both discovered by their line spectrum
- 7What size did Dobereiner organise the elements into? What were these groups called?They were organised into 3 elements and they were called 'triads'
- 8Give two reasons why Newlands' Octaves were criticisedHis groups contained elements that didn't have similar properties, he also mixed up metals and non-metals e.g. oxygen and iron
- 9Why did Mendeleev leave gaps in his Table of Elements?Mendeleev left gaps in his Table of Elements for undiscovered elements
- 10What feature of atoms determines the order of the periodic table?The elements are laid out in order of increasing proton number
- 11What is significant about the properties of elements in the same group?In each group they all have the same amount of electrons on the outer shell, for example all of the elements in Group 1 all have 1 electron on the outer shell
- 12What are the rows in the periodic table known as?Rows are also known as periods
- 13How many electrons can the first shell of any atom hold?2
- 14What is Ionic Bonding?Ionic bonding is when atoms lose or gain electrons they form charged particles called ions
- 15What kind of structures do ionic compounds form?Ionic compounds form a regular lattice
- 16Which group are the alkali metals?Group 1
- 17As you go down the group of alkali metals, do they become more or less reactive?They become more reactive as you go down
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- FlashCards sobre Additional Science Chemistry C4 Revision Summary - OCR 21st Century, criado por mariannakeating em 08-06-2015.
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