1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Llana [10]
3 years ago
5

The isotope of an atom containing 31 protons and 39 neutrons suddenly has two neutrons added to it. what isotope is created? loo

k up the peridoic table to find which element has 31 protons.
Gallium-72
yttrium-41
yttrium-72
Gallium-41
Chemistry
2 answers:
Fed [463]3 years ago
5 0
It is gallium look it up its what google says
Rashid [163]3 years ago
3 0

Answer: Gallium-72

Explanation:

Atomic number is defined as the number of protons or number of electrons that are present in an atom. It is characteristic of an element.

Atomic number = Number of electrons = Number of protons = 31

Thus the element with atomic number of 31 is Gallium.

Mass number is defined as the sum of number of protons and neutrons that are present in an atom.

Mass number = Number of protons + Number of neutrons

There were 39 neutrons and then 2 more were added , thus there are 39+2 = 41 neutrons

Thus mass number = 31 + 41 = 72

Thus the element will be gallium with 72 mass number.

You might be interested in
The 10 short columns in the middle of the periodic table make up the
nekit [7.7K]

Answer:

The transition elements or transition metals occupy the short columns in the center of the periodic table, between Group 2A and Group 3A.Explanation:

6 0
2 years ago
Read 2 more answers
2020-21 CCS 8SCI SMA 10 P.1.1, 1.22 of 18
Mars2501 [29]

Answer:

d d d d  d d d d  d dd  d d d  d .

f q  q q q q

6 0
3 years ago
Read 2 more answers
What are the Lewis definitions of an acid and a base? In what way are Bronsted definitions? they more general than the In terms
kati45 [8]

Explanation:

Lewis definition of Acids and Bases

Chemical species which are capable of accepting electron pairs or donating protons are called Lewis acid.

Chemical species which are capable of donating electron pairs or accepting protons are called Lewis base.

Bronsted definition of acids and bases

Chemical species which are capable of donating H+ are called Bronsted acids.

Chemical species which are capable of accepting H+ are called Bronsted bases.

So all Bronsted acids are Lewis acids but all Lewis acids are not Bronsted acids.

For a chemical species to behave as Lewis acid, they must have:

  • Incomplete octet
  • Double bond
  • Vacant d-orbitals

For example, in BF3, octet of boron is incomplete, so it can accept a pair of electron and behaves as Lewis acid.

For a chemical species to behave as Lewis base, they must have:

  • lone pair of electrons

For example, NH3 and OH, both N and O have lone pairs of electrons, hence behave as Lewis base.

4 0
3 years ago
The atomic mass of Cu is 63.5. Find its electrochemical equivalent​
FrozenT [24]

Answer:

The electrochemical equivalent of copper, Cu, is 3.29015544 × 10⁻⁷ g/C

Explanation:

The given parameters are;

The element for which the electrochemical equivalent is sought = Copper

The atomic mass of copper = 63.5

The electrochemical equivalent, 'Z', of an element or a substance is the mass, 'm', of the element or substance deposited by one coulomb of electricity, which is equivalent to a 1 ampere current flowing for a period of 1 second

Mathematically, we have;

m = Z·I·t = Z·Q

We have;

Cu²⁺ (aq) + 2·e⁻ → Cu

Therefore, one mole of Cu, is deposited by 2 moles of electrons

The charge carried one mole of electrons = 1 Faraday = 96500 C

∴ The charge carried two moles of electrons, Q = 2 × 96500 C = 193,000 C

Given that the mass of an atom of Cu = 63.5 a.m.u., the mass of one mole of Cu, m = 63.5 g

Z = \dfrac{m}{Q} = \dfrac{63.5 \ g}{193,000 \ C} = 3.29015544 \times 10^{-4} \, g \cdot C^{-1}

∴ Z = 3.29015544 × 10⁻⁴ g/C = 3.29015544 × 10⁻⁷ g/C

The electrochemical equivalent of copper, Cu, is Z = 3.29015544 × 10⁻⁷ g/C

7 0
3 years ago
HELPPP<br>yall please help my sister won't help me ​
ira [324]

\text{H}_3\text{PO}_4  + 3\text{KOH}  \longrightarrow \text{K}_3 \text{PO}_4     +3\text{H}_2 \text{O}\\\\10\text{Na} +2 \text{NaNO}_3  \longrightarrow 6\text{Na}_2 \text{O} + \text{N}_2\\\\\  2\text{H}_3 \text{PO}_4 + 3\text{Mg(OH)}_2 \longrightarrow \text{Mg}_3(\text{PO}_4)_2+6\text{H}_2 \text{O}\\\\2\text{Al(OH)}_3 + 3\text{H}_2 \text{CO}_3 \longrightarrow \text{Al}_2(\text{CO}_3)_3 + 6\text{H}_2 \text{O} \\\\2\text{C}_6\text{H}_6+15\text{O}_2 \longrightarrow 12\text{CO}_2 +6\text{H}_2 \text{O}\\

\text{Pb(OH)}_2 +2\text{HCl} \longrightarrow \text{PbCl}_2 +2 \text{H}_2 \text{O}

2\text{Mn} + 6\text{HI} \longrightarrow 3 \text{H}_2+2\text{MnI}_3

3 0
2 years ago
Other questions:
  • When sodium metal is added to water, an orange flame is observed on the metal surface. Based on this observation, what can best
    6·1 answer
  • Which method is the first step when scientists communicate their scientific results?
    11·1 answer
  • How many grams of a stock solution that is 87.5 percent H2SO4 by mass would be needed to make 275 grams of a 55.0 percent by mas
    6·2 answers
  • How many atoms total are present in one molecule of 5-methyl-2 hexanol C7H16O
    11·1 answer
  • How many significant figures in 890
    9·1 answer
  • I think I put my in it when I asked Jane about her ex-husband<br>root<br>​
    12·1 answer
  • What type of chemical reaction is the following reaction: Zn + 2HCI --&gt; ZnCl2 + H2?
    11·1 answer
  • Which atom in each pair that has the largest atomic radius.
    14·1 answer
  • My last question its easy but i dont get it lol help plz
    15·2 answers
  • How toxic is uranium
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!