periodic table
what are representative element groups?
1,2,13,14,15,16,17,18
what forms an ionic bond?
metals and nonmetals
what does a covalent bond depend on?
their electronegativity i.e. the power of an atom in a molecule to attract electrons to itself.
How many valence electrons does an iodine atom have?
7
Why do different chemicals produce different flame colors?
The light has different wavelengths.
what do nonmetals do to become stable?
nonmetals gain to become stable
What makes ionic bonds stay together?
the electrostatic attraction between ions that are near one another
How many electrons does a nitrogen atom need to gain in order to attain a noble-gas electron configuration?
3 electrons
An electron is in the highest occupied energy level of an atom
What do the Bohr models of Magnesium (Mg) and Calcium (Ca) have in common?
same number of valence e-
what does calcium do to become stable and what is its change?
calcium loses and its charge is 2+
What forms an ionic bond?
metals, losing electrons, and nonmetals, gaining electrons
How many electrons are shared in a single covalent bond?
2
How many valence electrons does oxygen have?
6
Electrons CLOSER to the nucleus have ______________ than valence electrons.
less energy
how many rings does iron have?
4 rings
What does ionic bonding require?
positive and negative charges must be balanced
What is the total number of covalent bonds normally associated with a single carbon atom in a compound?
4
How do valence electrons affect reactivity?
determines whether they tend to give up or gain electrons in chemical reactions
Which has more valence electrons, Sulfur or Silicon?
sulfur
how many valence electrons does argon have in its last ring?
8 valence electrons
what is an ionic bond?
type of linkage formed from the electrostatic attraction between oppositely charged ions in a chemical compound
what is a covalent bond?
the interatomic linkage that results from the sharing of an electron pair between two atoms
how many valence electrons does lanthanum have?
we don't know because it cant be determined by the periodic table
What elements are mostly left of the stair ladder?
metal