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Abby . Inglês 15 flashcards

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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
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