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
mylen [45]
3 years ago
5

When trying to identify an unknown element, a scientist determines what other elements the unknown element reacts with chemicall

y. Which property of the unknown element determines the other elements it reacts with?
Chemistry
2 answers:
mariarad [96]3 years ago
8 0

The number of valence electrons and electronegativity of an element in the unknown element determines the other elements it reacts with.

<u>Explanation:</u>

The ability of an atom to attract the electrons for bonding is called electro negativity. When an atom has highjer electronegativity it can attract electrons stronger. When the atom's electronegativity is lower it can attract electrons weaker. This property is very important in the determination of how well an element can readily react with another element.  

The determination of an element's reactivity can also be done  by the number of valence electrons in the outermost shell. The elements that has valence electrons lesser than 4 will be giving its valence electron for getting 8 electrons in the next shell so that it can become an ion of stable nature. An element that has 4 electrons will form covelant bond. The elements that have greater than 4 electrons will be getting electrons from some other element.

BartSMP [9]3 years ago
5 0

Answer:

Its D

Explanation:

You might be interested in
How many moles of NO3 are there in 6.2g
weeeeeb [17]
<span>6.2 divided by the mass number of NO3 is 0.1 moles.</span>
4 0
3 years ago
What is the correct notation for a calcium ion whose outershell is a full octet?
horsena [70]
<span>Ca^(2+). Calcium is an alkaline earth metal with an atomic number of 20. Its electronic configuration is (2, 8, 8, 2). From the electronic configuration it would be observed that calcium has two valence electrons. Calcium shares these two electrons with non metals like sulphur in an ionic bond to obtain an outer shell which is full octet. Let me use Sulphur. When calcium gives out its two valence electrons its electronic configuration becomes (2, 8, 8) thereby obtaining a stable out shell and the calcium ion becomes Ca^(2+). The sulphur also obtains a stable octet because it has 6 valence electron initially.</span>
8 0
2 years ago
100.0 mL of Ca(OH)2 solution is titrated with 5.00 x 10–2 M HBr. It requires 36.5 mL of the acid solution for neutralization. Wh
miskamm [114]

Answer:

The number of moles HBr = 0.001825

The concentration of Ca(OH)2 = 0.009125 M

Explanation:

Step 1: Data given

Volume of the Ca(OH)2 = 100.0 mL = 0.100 L

Molarity of HBr = 5.00 * 10^-2 M

Volume of HBR = 36.5 mL = 0.0365 L

Step 2: The balanced equation

Ca(OH)2 + 2HBr → CaBr2 + 2H2O

Step 3: Calculate molarity of Ca(OH) 2

b*Va* Ca = a * Vb*Cb

⇒with b = the coefficient of HBr = 2

⇒with Va = the volume of Ca(OH)2 = 0.100 L

⇒with ca = the concentration of Ca(OH)2 = TO BE DETERMINED

⇒with a = the coefficient of Ca(OH)2 = 1

⇒with Vb = the volume of HBr = 0.0365 L

⇒with Cb = the concentration of HBr = 5.00 * 10^-2 = 0.05 M

2 * 0.100 * Ca = 1 * 0.0365 * 0.05

Ca = (0.0365*0.05) / 0.200

Ca = 0.009125 M

Step 4: Calculate moles HBr

Moles HBr = concentration HBr * volume HBr

Moles HBr = 0.05 M * 0.0365 L

Moles HBr = 0.001825 moles

3 0
3 years ago
Magnesium has three common isotopes.
sladkih [1.3K]

Answer:

Explanation:

percentage abundance of third isotope = 100 - ( 78.900 + 10.009)

= 11.091 %

Atomic mass

24.1687 x .789 + 25.4830 x .10009 + 24.305 x .11091  

19.069 + 2.5506 + 2.69566

= 24.3153 amu

7 0
2 years ago
Express 250,000 mL in liters.<br> A) 0.25 L <br> B) 2,500 L <br> C) 25 L <br> D) 250 L
elena-s [515]
D) 250l
Explanation :
250,000/1000
5 0
3 years ago
Read 2 more answers
Other questions:
  • Cathode ray tube experiments
    9·1 answer
  • A sample of ethane (C2H6)was combusted completely and the water that formed has a mass of 1.61 grams.How much ethane, in grams,
    10·1 answer
  • explain how chemists can state with certainty that no one will discover an element between sulfur and chlorine?
    15·1 answer
  • An element is an arrangement of atoms in a particular way; True or False?
    5·1 answer
  • Which of the following elements is most metallic?
    8·1 answer
  • Acetaldehyde is a substance commonly used in chemical factories. It is often produced by
    12·1 answer
  • WHat is zinc please answer correct really important
    6·2 answers
  • Explain Rutherford’s gold foil experiment. What particle did he discover?
    7·1 answer
  • What is the number of Carbon atoms in 9.837 x 1024 molecules of CO2
    13·1 answer
  • Write the skeleton equation for the reaction between hydrochloric acid (HCl) and zinc. The products are hydrogen gas and zinc ch
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!