To the left of the table; usually exist as shiny solids, are good conductors of heat and electricity. Are solids at room temperature, except for mercury (Hg), which is a liquid.
Where are the nonmetals located?
to the right of the table, usually do not have a shiny appearance. Are usually poor conductors of heat and electricity. Can be solids (sulfur, carbon), liquids (bromine), or gases (nitrogen, oxygen) at room temperature
Where are the metalloids located?
To the right of the table In the squiggly lines
Which four nonmetals comprise 96% job the mass of the human body and are called building block elements?
What is the chemistry of an element determined by?
the number of electrons in an atom
_______________ do not move freely in space; rather they occupy specific energy levels.
Energy levels or shells
the regions occupied by electrons
What are the shells numbered?
Where are the electrons in the lower numbered shells?
closer from the nucleus and are lower in energy
Where are the electrons in the higher numbered shells?
further from the nucleus and higher in energy
1. 1st shelf is lowest energy; 2nd shelf is the 2nd highest energy and so on. 2. Arranging books, it takes less energy to fill 1st shelf, and then 2nd shelf & so on. 3. It is not possible to put books between the levels.
1. level has lowest energy; 2nd level has the 2nd highest energy & so on. 2. Electrons is the 1st level have the lowest energy, followed by the 2nd level & so on. 3. Electrons in energy levels are specific (meaning they are quantized)
1. Shelves have a similar difference between levels 2. Shelves hol equal # of books of the same size.
1. Lower energy levels are further apart, higher energy levels are close together. 2. Lower energy levels hold fewer electrons
What happens with larger numbers (n)?
they are farther from the nucleus, have a larger volume, & therefore, can hold more electrons