Regents Flashcards
What are cations
Cations are positive (+) ions and form when an atom loses electrons.
Anions are
negative ions and form when a neutral atom gains electrons
C-14 is used to
determine the ages of organic material up to 23,000 years old.
U-238 is used to
Determine the ages of rocks.
What is a bright line spectra
Bright line spectra is produced when electrons fall from higher energy levels to ground state
When a chemical bond breaks…
Energy is absorbed
When a chemical bond forms…
Energy is released
Metallic bonds
“sea” of mobile valence electrons
Polar Covalent bond
between two nonmetals, when the electronegativity difference is between 0.6 and 1.7
Ionic bonds
transfer of electrons, form when electronegativity difference is above 1.7
Are hydrocarbons polar?
No
Are hydrocarbons electrolytes?
No, they are nonelectrolytes.
I-131 is used to
treat thyroid disorders
Co-60 is used to
treat cancer tumors
fermentation
yeast catalyzes a sugar to make carbon dioxide and ethanol
