Every atom of a particular element contains the same number of --------------------? But varies in--------------------?
When is a valance electron less reactive? When is it more reactive?
It is less reactive when there are more valance electrons
It is more reactive when there are less valance electrons
How do chemists classify a metal
They classify them on their physical properties such as; hardness, shininess, malleability and ductility.
the metals in a group or family have similar properties and these family properties change gradually as you move across the table. True or false?
How many valance electrons do Alkali metals have?
one. Easily transferred to other atoms during chemical change.
Groups 3 through 12. form a bridge between the very reactive metals on the left side and the less reactive metals in the right side.
Nonmetal elemnts are gases at room temperature? true or false?
True. In general physical properties of metals are opposite to those that characterize the metals.
Group 16. Contains elements that have 6 valance electrons in their atoms. Typically gains or shares twoelectrons when it reacts.
In what order did Mendeleev arrange the elements in the periodic table?
in order pf increasing atomic mass
What can you predict about an element from its posotion on the peridoc table?
An elements properties
What do elements in the same column in the periodic table have in common?
the elements have the same number and arragement of valance electrons
is involved in the transfer or sharing of electrons.
The number of electrons on the outer(last) shell
Sodium and calcium are in different families of metals. Name the families of metals in which they belong, and describe each family's characteristics.
Sodium(Na) belong to Group 1 where as calcium (Ca) belongs to Group 2. Both families are highly reactive and Na is a alkali metal and Ca is a alkaline earth metal. Na is highly reactive. Ca is not AS reactive.
Would a metal in group 13 be more reactive than a metal in group 1? Explain.
No, because Group 1(Alkali metals) metals are VERY reactive where as group 14(Metals in Mixed Groups) are not as reactive.
Group 18, do not ordainarly form compounds. they do not gain or loose or share electrons.
substances that under some conditions can carry electricity like a metal, while under some additions other conditions cannot, like a nonmetal.
state of matter, atoms are stripped of their electrons and the nucllei are packed closely together.
atomic nuclei combine to form a larger nucleus, releasing huge amounts of energy in the process.
How do starts create heavier elements?
In a nuclear fusion tah tcombines smaller nuclei into larger nuclei