Like rubidium, it has 5 electron shells or energy levels, and in accordance with the Madelung rule it has two electrons in its 5s subshell.
Strontium
is a soft metal and is extremely reactive upon contact with water.
Which metal in period 5 is very reactive and has two valence?
Which metal in Period 5 is very reactive and has two valence electrons in each atom?
rubidium
– Brainly.in.
What metals have 2 valence electrons and are reactive?
- Elements in group 2 of the periodic table are called alkaline Earth metals. …
- Alkaline Earth metals are very reactive because they readily give up their two valence electrons to achieve a full outer energy level, which is the most stable arrangement of electrons.
What metal is in period 5?
The period 5 transition metals are
yttrium (Y)
, zirconium (Zr), niobium (Nb), molybdenum (Mo), technetium (Tc), ruthenium (Ru), rhodium (Rh), palladium (Pd), silver (Ag), and cadmium (Cd).
What period has 2 valence electrons?
Period 2
elements (carbon, nitrogen, oxygen, fluorine and neon) obey the octet rule in that they need eight electrons to complete their valence shell (lithium and beryllium obey duet rule, boron is electron deficient.), where at most eight electrons can be accommodated: two in the 2s orbital and six in the 2p subshell.
Which element comes in 5th period of Chalcogen?
| Hydrogen | Caesium | Barium | Lutetium | Hafnium | Tantalum |
|---|
Which element is in period 5 Group 2?
“
Beryllium
.” Periodic Table of Elements and Chemistry.
Is 6 valence electrons reactive?
Group 16 elements with six valence electrons
are almost as reactive for the same reason
. Atoms of group 18 elements have eight valence electrons (or two in the case of helium). These elements already have a full outer energy level, so they are very stable. As a result, they rarely if ever react with other elements.
Why is group 2 less reactive?
These elements are representative metals, metalloids, and nonmetals. … The outermost electrons of the alkaline earth metals (group 2)
are more difficult to remove than the outer electron of the alkali metals
, leading to the group 2 metals being less reactive than those in group 1.
Why is group 2 called alkaline earth metals?
Beryllium, magnesium, calcium, strontium, barium and radium are the elements in Group 2. For two reasons, these elements are referred to as Alkaline Earth metals,
Their oxides remain in the crust of the earth and are very heat-stable
. … The elements of Group 2 of the periodic table are alkaline earth metals.
What are the 5 compounds?
- Sugar (sucrose – C12H22O11)
- Table salt (sodium chloride – NaCl)
- Water (H2O)
- Carbon dioxide (CO2)
- Sodium bicarbonate (baking soda – NaHCO3)
Is silicon a metal?
For this reason, silicon is known as a chemical analogue to carbon. … But unlike carbon, silicon a
metalloid
— in fact, it’s the most common metalloid on earth. “Metalloid” is a term applied to elements that are better conductors of electron flow — electricity — than nonmetals, but not as good as metals.
Which is the lightest noble gas?
Helium
is the lightest of the noble gases, and the second most abundant element in the universe; the Sun produces hundreds of millions of tonnes of helium every second.
Does Period 1 have 2 valence electrons?
| Hydrogen | Rubidium | Strontium | Yttrium | Zirconium | Niobium |
|---|
What Period 2 element has 4 valence electrons?
These are transitional metals, which have special circumstances. Following this rule: Elements in group 1 have one valence electron; elements in group 2 have two valence electrons; elements in group 13 have three valence electrons; elements in
group 14
have four valence electrons; and so forth up to group 18.
What element has a valence of 2?
A:
Calcium
is a group 2 element with two valence electrons.
