Elements Flashcards
(10 cards)
1
Q
Element
A
An element consists of only one type of particles called atoms.
2
Q
Characteristics
A
- the simplest form of matter
- It cannot be divided into simpler substances by chemical or physical methods.
3
Q
Types of elements
A
Metal, nonmetal and metalloid
4
Q
Total number of elements
A
118 elements
92 natural and 26 man made
5
Q
Most abundant element
A
Non metal
6
Q
Percentage of different element available in earth
A
Oxygen
Silicon
Aluminium
Iron
Calcium
Sodium = potassium
Magnesium
Other
7
Q
Percentage of elements in human body
A
Oxygen
Carbon
Hydrogen
Nitrogen
Phosphorus
sodium
8
Q
What is metal?
A
Element which has tendency to form positive ion
9
Q
What is non metal?
A
Element which has tendency to form negative ion
10
Q
What is metalloid?
A
Elements which has properties of both metal and nonmetal
boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te), polonium (Po), and astatine (At)
