Group and Elements ONLY Flashcards
There are ____ elements in the modern periodic table.
The elements are arranged according to ___________ atomic number.
Each box contains one _________.
118
increasing
element
A _______ is a ‘row’ of the table. Rows run horizontally.
There are _____ periods in the modern periodic table.
period
7
The two rows below the periodic table are ________ and ________ —collectively called the ‘__________________’.
lanthanides and actinides
inner transition metals
_________ are often called _________, while _________ include mostly artificial elements with a few exceptions.
Lanthanides
rare earth elements
actinides
A _____ is a ‘column’ of the table. Columns run vertically.
There are ___ groups in the modern periodic table.
Groups ____ are sometimes labelled as ‘___________’ and referred to as ______
group
18
3-12
transition metals
d-block
The numbering ____ is established by IUPAC.
But most modern periodic tables use the conventional Roman numeral + letter combination (i.e., Group 1 is also labeled as Group IA).
1-18
Groups _____ belong to Group B,
Groups ____ and ____ belong to Group A and are also known as _________________
3-12 (Group B)
1-2 and 13-18 (Group A)
representative elements
• Good conductors of electricity and thermal energy
• High density
• Malleable
• High melting points
METALS
• Poor conductors of electricity and thermal energy
• Low density
• Brittle
• Low melting points
NON-METALS
properties of _________ can be similar to metals and non-metals.
They appear to be more like the _______, but some can conduct electricity.
These so-called _________ (___, ___, ___) are useful in many electrical devices.
metalloids
non-metals
semiconductors (Si, Ge, Sn)
GROUP IA: _____________
ALKALI METALS
VALENCE: +1
H, Li, Na, K, Rb, Cs, Fr, NH4+
Li - red
Na - yellow
K - violet
Rb - red
Cs - blue
GROUP IB: _______________
COINAGE METALS
Cu, Au, Ag
GROUP IIA: ________________
ALKALINE EARTH METALS
VALENCE: +2
Be, Mg, Ca, Sr, Ba, Ra
Ca - brick red
Sr - crimson red
Ba - yellow green
Ra - carmine red
GROUP IIB: ______________
VOLATILE METALS
Zn+2, Cd+2, Hg+1, +2
“Zi-Cad-Mer”
GROUP IIIA: ______________
BORON GROUP
B, Al, Ga, In, Tl
