3 years ago

Where are the rare earth metals located on the periodic table

Chemistry

1 answer:

maksim [4K]3 years ago

7 0

They are found in group 3 of the periodic table.

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How many orbitals surround the nucleus in a neutral atom of sulfur (S)?

Leto [7]

Explanation:

The atomic number of S is $16$

So,number of electrons in S is $16$

The electronic configuration of S is $2,8,6$

The orbital electronic configuration of S is $^{1}s_{2}^\text{ }^{2}s_{2}^\text{ }^{2}p_{x2}^\text{ }^{2}p_{y2}^\text{ }^{2}p_{z2}^\text{ }^{3}s_{2}^\text{ }^{3}p_{x2}^\text{ }^{3}p_{y1}^\text{ }^{3}p_{z1}^\text{ }$

So,the number of orbitals involved is 9.

3 0

3 years ago

How do catalysts function? A. They protect the products from external reactions. B. They increase the activation energy of an el

tamaranim1 [39]

The answer is C. They lower the activation energy of an elementary step of a reaction
This makes the reaction rate to increase since less energy is required to make a reaction occur.

3 0

3 years ago

Consider a mystery compound having the formula MxTy. If the compound is not an acid, if it contains only two elements, and if M

valkas [14]

Answer:

d.) It is a binary molecular compound.

Explanation:

The compound in question has a formula $M{x}T_{y}$ . The compound is not acidic in nature and the element 'M' is not a metal. This shows that the compound does not contain any metal. Based on the definition of a binary molecular compound as a compound comprising elements that are not metals. Therefore, the compound is obviously a binary molecular compound.