Metals are found towards the left hand side of the periodic table while Nonmetals are found towards the right hand side of the periodic table.
Non metals are found towards the right hand side of the periodic table. They are not all gaseous at room temperature some nonmetals such as iodine are solid at room temperature.
Nonmetals usually have low melting and boiling points, are brittle, have relatively low density and are not good at thermal and electrical conduction.
Potassium - 39 contains 19 protons, 20 neutrons and 19 electrons. Recall that the number of protons and electrons are equal in a neutral atom.
The following is an accurate matching of the ions;
11 protons, 12 neutrons, 10 electrons = +1 - Na^+
31 protons, 39 neutrons, 28 electrons = +3 - Ga^2+
Group 2, period 5 = +2 - Sr^2+
Silver is a lustrous metal.
- Elements that share the most characteristics are found on the periodic table in the same "horizontal period". False
- If matter has a higher temperature, that means there will be "more" molecular motion. True
- If you cool down a propane tank, there will be "less" pressure in it. True
- If you put a balloon in a freezer, its volume would "increase". False
- If you put the balloon into a chamber where there is half the pressure, its volume will "double". True
- The average atomic mass of Aluminum (Al) is "16.00 amu". False
- Oxygen's atomic number is "8" therefore it has "8" protons in its nucleus. True
- An "electron" has the same mass as a neutron. False
- The nucleus contains "protons and neutrons", virtually all the mass of an atom - True
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