PERIODIC TABLE-Characteristics of Metal and Non-metals Flashcards
What are the key physical properties of metals?
Shiny
High melting points
Good conductors of electricity
Good conductors of heat
High density
Malleable and ductile
What are the key physical properties of non metals?
Dull
Low melting points
Poor conductors of electricity
Poor conductors of heat
Low density
Brittle
What are some common properties of transition metals?
Transition metals are good conductors of heat and electricity, can be shaped easily, have high melting points, are hard and tough, have high densities, and are often colored.
Why do transition metals have high melting points and high densities compared to metals in Group 1?
Transition metals have stronger bonds between their atoms, making them harder and able to withstand higher temperatures, which gives them higher melting points and greater density than Group 1 metals.
What are the characteristics of Group 2 elements?
They are fairly soft metals
They are shiny, silery-white
They have fairly high melting and boiling points
Their atoms have two valence electrons
Why are transition metals considered good conductors of heat and electricity?
Transition metals are good conductors because they have free electrons that move easily, allowing heat and electricity to pass through them.
How do the physical properties of Group 2 elements compare to those of Group 1 elements?
Group 2 elements are harder and have higher melting points than Group 1 elements, but both are good conductors of heat and electricity.
Which physical property is common to both metals and non-metals in terms of electrical conductivity?
Some non-metals (like graphite) can also conduct electricity, just like metals.
What is the significance of having two valence electrons in Group 2 elements?
Having two valence electrons makes Group 2 elements reactive because they can easily lose these electrons when they react with other substances.
Why are transition metals usually hard and tough?
Transition metals are hard and tough because their atoms are strongly bonded, and the electrons in their outer shells help hold the structure together.
