What is an atom? An atom is the . All are made of atoms, they contain protons, and .
What is an electronic configuration? It is the of in around the in the .
What is this?
Electronic configuratin
Shorthand notation
Check all the right answers. Why does reactivity increase moving down group1?
because the radius of the atom decreases
because the radius of the atom increases
the valence electron decreases and it becomes easier for the atom to lose its valence electrons
the force of attraction between nucleus and the valence electron decreases
the valence electron becomes far away from the nuclues
the valence electron decreases and it becomes harder for the atom to lose its valence electrons
the valence electron becomes closer to the nucleus
Explain how group II metals are less reactive than group I. Atoms of group 2 metals have valence electrons, while atoms of group 1 metals have valence electrons. It is to lose valence electrons than losing just electron.
Transition metals.....
A.Form coloured compounds
B. Are good conductors of heat and electricity
C. Are malebale
D. Are less reactive than alkali metals
E. They are usually hard and tough
F. All of the above
Group 1 elements are strong and hard.
Check all right answers. Group1 elements...
Have low melting points
Are strong and hard
Are high coloured
Ionic Compounds are solids at room temperature
Ionic compounds have low densities.
Ionic compunds are soluble in water.
Check all right answers. Covalent Compounds......
Can be solids
Can't be liquids
Have low melting and boiling points
Can be gases
Have high melting and boiling points
Most of the covalent compounds dissolve in water
Most of the covalnet compunds do not conduct electricity
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