All categories

2 years ago

How can the periodic table predict properties of elements?

1 answer:

3 0

A major factor in how the periodic table is organized is the configuration of each element's valence electrons. Because elements in each family have the same number of valence electrons, they tend to have several similar characteristics.

You might be interested in

What test would you use to identify a solution of fecl3

uysha [10]

Answer:

Ferric chloride test

Explanation:

The ferric chloride test can be used to detect metabolites in urine in case of inborn error of metabolism such as phenylketonuria. Compounds such as phenylpyruvate increase in plasma and are excreted out via urine. Also, it can be used to detect salicylates in urine, quick diagnostic test for aspirin overdose.

4 0

3 years ago

Look at the equation for a displacement reaction below. What lost electrons in the reaction? Give the full name, not the symbols

garri49 [273]

Answer:

Cupric ions

Explanation:

In the single displacement reaction shown, the cupric ions lost two electrons.

Cu²⁺ + 2e⁻ → Cu

The replacement of a metallic ion in solution by a metal atom higher in the activity series than than the metal in solution falls into this category of reactions.

Since Zn higher in the series, it displacements the cupric ions.

5 0

3 years ago

The law of conservation of energy describes the total amount of energy in a system. Which statements explain why the conservatio

Advocard [28]

It is a statement of fact. explains how energy is produced, and describes the behavior of energy.

3 0

3 years ago

Chem Equations Balance and Classify each of the following equations into: Combination reaction, Decomposition Reacti

Arlecino [84]

Answer :

(A) The balanced chemical reaction will be:

$2KBr(aq)+Cl_2(g)\rightarrow 2KCl(aq)+Br_2(l)$

This reaction is a single replacement reaction.

(B) The balanced chemical reaction will be:

This reaction is a double displacement reaction.

(C) The balanced chemical reaction will be:

$N_2(g)+3H_2(g)\rightarrow 2NH_3(g)$

This reaction is a combination reaction.

Explanation :

Balanced chemical reaction : It is defined as the reaction in which the number of atoms of an element present on reactant side must be equal to the product side.

Part (A):

The balanced chemical reaction will be:

$2KBr(aq)+Cl_2(g)\rightarrow 2KCl(aq)+Br_2(l)$

This reaction is a single replacement reaction in which the most reactive element displaces the least reactive element from its solution.

Part (B):

The balanced chemical reaction will be:

$CaBr_2(aq)
+H_2SO_4(aq)\rightarrow CaSO_4(s)+2HBr(g)$

This reaction is a double displacement reaction in which a positive cation and a negative anion of two reactants exchange their places to form two new products.

Part (C):

The balanced chemical reaction will be:

$N_2(g)+3H_2(g)\rightarrow 2NH_3(g)$

This reaction is a combination reaction in which the two atoms combine to form a larger molecule.

3 0

3 years ago

Which of the following best describes the movement of particles in a solid?

Volgvan

Answer:

Explanation:

particles are frozen and hence will vibrate in their fixed positions

5 0

3 years ago