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
zavuch27 [327]
3 years ago
7

The periodic table is an arrangment of the chemical elements, ordered by atomic number, into families, and by doing so illustrat

es the periodic properties of the elements. Considering the organization of the periodic table, which pair of elements represents a very reactive element and a very non-reactive element?
A) Cesium and Neon
B) Silver and Gold
C) Sodium and Chlorine
D) Uranium and Hydrogen
Chemistry
1 answer:
Vlada [557]3 years ago
8 0

Answer:

Cesium and Neon

Explanation:

Remember, Neon is a noble gas, also called an inert gas. It does not react really to form compounds. Although chlorine is only one column to the left of neon, it is very reactive and ready forms a salt when combine with sodium. The other elements have similar reactivities to each other. Only Neon is a non-reactive choice.

You might be interested in
1. A sample of oxygen is collected over water at 22 ° C and 762 torr. What is the partial pressure of the dry oxygen? The vapor
Rom4ik [11]

Answer: The partial pressure of the dry oxygen is 742 torr

Explanation:

Dalton's Law of Partial Pressure states that the total pressure exerted by a mixture of gases is the sum of partial pressure of each individual gas present. Thus P(total)=P_1+P_2 .........

Given; Total pressure = 762 torr

partial pressure of water = 19.8 torr

partial pressure of dry oxygen = ? torr

Total pressure  = partial pressure of water + partial pressure of dry oxygen

762 torr = 19.8 torr = partial pressure of dry oxygen

partial pressure of dry oxygen = 742 torr

The partial pressure of the dry oxygen is 742 torr

8 0
3 years ago
. Each antibody is designed to fight off how many pathogens
Alex_Xolod [135]
Antibodies can destroy pathogens by (i) binding to and blocking the pathogen's receptors, thus causing neutralization of the pathogen, (ii) binding to the pathogen and activating complement, and (iii) binding to the pathogen and facilitating its opsonization and uptake by macrophages, which utilize their Fc receptors ...
4 0
2 years ago
A 29.8 mL sample of a 0.476 M aqueous hydrocyanic acid solution is titrated with a 0.487 M aqueous barium hydroxide solution. Wh
riadik2000 [5.3K]

Answer:

The pH is 4.76

Explanation:

Step 1: Data given

Volume of a 0.476 M hydrocyanic acid solution = 29.8 mL = 0.0298 L

Volume of 0.487 M barium hydroxide solution = ?

Ka HCN = 6.2 * 10^-10

Step 2: Calculate pH

Hydrocyanic acid is a weak acid.

Barium hydroxide is a strong base.

 

The question asked = the pH BEFORE any base has been added, so we can ignore the base.  

 

To calculate the pH of aweak acid, we need the pKa

HCN ⇔ H+ + CN-

Ka =  [H+][CN-]/[HCN]

⇒ for weak acid: [H+]=[CN-]

Ka = [H+]²/[HCN]

[H+]² = [HCN]*Ka

[H+] = √([HCN]*Ka)

pH = -log(√([HCN]*Ka))

pH = -log(√(0.476 * 6.2*10^-10))

pH = 4.76

The pH is 4.76

7 0
3 years ago
Can you help me with this i don't think it is that hard i just have a lot on my mind.
ivolga24 [154]

Answer:

Global wind

Explanation:

The jet streams go around the whole earth from west to east

Hope you have a good day :)

8 0
3 years ago
Electrons of an atom that participate in chemical bonding
IrinaVladis [17]
If you want the scientific term they are valence electrons

7 0
3 years ago
Other questions:
  • If you set up an experiment with two different independent variables, then the results would be_____.
    15·1 answer
  • Which phrase correctly describes the outer shell of electrons of each atom in most covalent compounds?
    10·2 answers
  • What kind of reaction happens when you mix Baking soda and vinegar? (In your own words)
    9·1 answer
  • An acid base indicator is a dye that is:
    11·1 answer
  • What is the scientific term for rocks made in lava?
    6·2 answers
  • Given that the wavelength of a wave is 4.57 x 10^9 m, what must be the
    9·1 answer
  • 2CO + O2 --> 2CO2
    11·1 answer
  • Molecules have Question 8 options: A) only kinetic energy. B) neither kinetic nor potential energy. C) only potential energy. D)
    9·1 answer
  • How many grams of NaOH are needed to make 250mL of a 0.1M NaOH solution?
    11·1 answer
  • According to Hebrews 11, what did Abraham believe God would do if Isaac was slain as a sacrifice?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!