week 1, concept 4: Periodic table (matter and atoms) Flashcards
1
Q
A
2
Q
who created the periodic table?
A
Dmitri Mendeleyev (1834-1907)
3
Q
Arranged elements with recurring set of _ in the same column (_ ); Li, Na, and K, for example, fall in the same column and start new periods (_ ).
A
Arranged elements with recurring set of properties in the same column (vertical row); Li, Na, and K, for example, fall in the same column and start new periods (horizontal rows).
4
Q
The four halogens?
A
- Fluorine and chlorine are gases,
- bromine is a liquid
- iodine is a solid.
5
Q
classification of elements
(visual)
A
6
Q
Metals are:
(6)
A
- Are solids at room temperature (except for Hg, which is a liquid)
- shiny
- conduct electricity
- ductile
- malleable.
- In chemical reactions, they tend to give up electrons.
7
Q
Nonmetals are:
(2)
A
(Except for hydrogen (H), )
- they lie on the right side of the Periodic Table.
- In chemical reactions, they tend to accept electrons.
8
Q
Metalloids are:
A
They have some of the properties of metals and some of nonmetals
9
Q
Six elements are classified as metalloids:
A
- boron
- silicon
- germanium
- arsenic
- antimony
- tellurium.
10
Q
melting and boiling points of the halogens
(visual)
A
11
Q
A
12
Q
A
13
Q
A
