Karteikarten
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Karten in diesem Stapel (15)
- 1Label the protons, neutrons and electrons on this atom.- electrons in the energy levels (shells)
- protons and neutrons are in the nucleus of an atom.
- 2What does the atomic number represent?The number of protons and electrons in the nucleus.
- 3What does the mass number represent?The sum of the protons and neutrons in the nucleus.
- 4How do you find the number of neutrons in the nucleus of an atom?Atomic Mass - Atomic Number = Number of neutrons
- 5What is a 'period' in the periodic table?Horizontal rows. i.e. H to He
- 6What is a 'group' in the periodic table? What is similar in each group?Vertical columns. i.e.
Groups contain similar chemical properties and gradual change in physical properties. - 7Group 1 elements are known as?Alkali Metals
- 8Group 2 elements are known as?Alkali Earths
- 9Group 3-12 elements are known as? (middle 10)Transitional Metals
- 10Where are the noble gases?Group 18 or last group. i.e. He, Ne, Ar, Kr, Xe, Rn
- 11What elements are in the halogens group?Group 17 or F, Cl, Br, I, At
- 12Properties of metals.- good conductors of heat
- high density
- hard
- malleable or ductile - 13Properties of non-metals.- usually gases
- poor conductors
- brittle - 14Electron Configuration?2,8,8
- 15—
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- Karteikarten am Ohne Titel, erstellt von Abby . am 18/02/2020.
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- Abby . · Feb 2020
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- 18 Feb 2020
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