Electronic structure and valence electrons
What does the Group number tell us about the elements in that group?
The number of valence electrons
The atomic number tells how many _________ are in a atom of the element.
protons
The layer of electrons arranged the nucleus of the atom.
electron shells
Alkali metals are __________ in Group 1 that produce alkalis when they react with water.
Metals
A lot of the _____ _________ that plants take from the air eventually goes back into the air again when plants and animals respire.
carbon dioxide
What is the electronic structure of Magnesium?
[2,8,2]
The mass number tells how many protons plus _____________ are in an atom.
neutrons
The arrangement of the electrons in the shells or levels around the nucleus of the atom.
electronic structure
The elements found in Group 7 of the periodic table are called ____________.
halogens
The pathway by which carbon atoms go between organism and the environment.
the carbon cycle
Metals always react by doing the same thing. What is that?
The periodic table is arranged in groups that are similar. Are the groups arranged by row or column?
Groups are arranged by columns
What is the electronic configuration of carbon?
2,4.
The elements found in Group 8 of the periodic table are called the _______ __________.
Noble gases
Water combines with carbon dioxide, inside ___________, to make glucose and oxygen
chloroplasts
Where are the valence electrons found?
In the outermost electron shell of the atom
Alkali metals
Why is francium the most reactive metal in the periodic table?
it has the largest atomic radius and only 1 valence electron. This is easily lost as it is not strongly held by the nucleus as it is far away from the positive charge and is shielded by the electron shells filled between the nucleus and the valence electron.
A __________ in the periodic table is a row of chemical elements.
period
Plants contain long tubes, called _______, which transport water from the roots up to the leaves
xylem
Gain or share electrons in their valence shell.
The elements __________ in mass as you progress from left to right on the periodic table.
increase
How many protons, electrons and neutrons are in an atom of sodium?
11,11,12
The third period contains eight elements: sodium, magnesium, aluminum, silicon, phosphorus, sulfur, chlorine, and argon.
Among these, three are metals (sodium, magnesium, aluminum), four are nonmetals (phosphorous, sulfur, chlorine, argon) and one is metalloid (silicon).
When non-metals form compounds with other non-metals they do so by _______ electrons to fill their outermost shells.
What kind of bond is this called?
sharing
covalent bond