To have the right combinations of foods to provide nutrients
Weathering is the process of breaking large rocks and boulders into much smaller ones. Weathering can be brought about by wind and water mostly. Sometimes even biological forces account for some types of weathering.
Answer: c. Shared equally between two atoms
Electrons are shared equally because the atoms have the same electronegativity.
Basic Information
Name:<span> Lanthanum </span>
Symbol:<span> La </span>
Atomic Number:<span> 57 </span>
Atomic Mass:<span> 138.9055 amu </span>
Melting Point:<span> 920.0 °C (1193.15 K, 1688.0 °F) </span>
Boiling Point:<span> 3469.0 °C (3742.15 K, 6276.2 °F) </span>
Number of Protons/Electrons:<span> 57 </span>
Number of Neutrons:<span> 82 </span>
Classification: Rare Earth
Crystal Structure:<span> Hexagonal </span>
Density @ 293 K:<span> 6.7 g/cm</span>3
Color:<span> white
</span>
Answer:-
Metalloids
Explanation: -
Metalloids are elements with properties that are somewhat in between those that of metals and non metals. They have generally 4 or 5 electrons in their valence shell for up to the 4th period to be called a metalloid. From the fifth period 6 valence electrons can make an element metalloid.
From the sixth even 7 valence electrons can make an element metalloid
The electronic configuration of Germanium is
2,8,18, 4
So it is a metalloid.
The electronic configuration of tellurium,
2,8,18, 18, 6
So it is a metalloid.
The electronic configuration of Arsenic
2,8,18, 5
So it is a metalloid.
The electronic configuration of astatine
2,8,18, 32, 18, 7
So it is a metalloid.
