All categories

2 years ago

Plz help I need to bring up my grade, this will help bring up my grade !!!!!!!

Chemistry

1 answer:

BartSMP [9]2 years ago

3 0

Answer:

WHY: You can abbreviate an element's electron configuration using the noble gas notation method because when you get down to the lower elements, specifically the d's and the f's, the electron configuration will be very long. The noble gas notation method is a faster answer while also being correct.

HOW: We can abbreviate an element's electron configuration by finding the last noble gas a specific element passed, for example calcium would have just passed Argon. Once you have the "address" of the previous noble gas, then you add on the difference between the element chosen and the noble gas, for example calcium would be [Ar] 4s^2.

Explanation:

You might be interested in

Sodium chloride can be produced by the reaction of sodium metal with chlorine gas. Which is the limiting reactant if 6.70 moles

Alecsey [184]

Answer:

Chlorine gas.

Explanation:

Hello!

In this case, the undergoing chemical reaction is:

$2Na+Cl_2\rightarrow 2NaCl$

Thus, given the moles of reacting both sodium and chlorine, we compute the moles of sodium chloride yielded by each reactant by considering the 2:2 and 1:2 mole ratios:

$n_{NaCl}^{by\ Na}=6.70molNa*\frac{2molNaCl}{2molNa}=6.70molNaCl \\\\n_{NaCl}^{by\ Cl_2}=3.20molCl_2*\frac{2molNaCl}{1molCl_2}=6.40molNaCl$

Thus, since chlorine yields less moles of sodium chloride, we infer it is the limiting reactant.

Best regards!

3 0

3 years ago

is it true or false that all atom´s electrons can interact with the electrons of other atom to form bonds

Sveta_85 [38]

False. only valence electrons can bond with other atoms' electrons.

3 0

3 years ago

Write a nuclear equation to describe the spontaneous fission of 95 244 Am to form I-134 and Mo-107. Determine how many neutrons

MissTica

Answer: 3 neutrons are produced in the above nuclear reaction.

Explanation:

In a nuclear reaction, the total mass and total atomic number remains the same.

The nuclear reaction for the fission of Americium-244 isotope follows:

$^{244}_{95}\textrm{Am}\rightarrow ^{134}_{53}\textrm{I}+^{107}_{42}\textrm{Mo}+Y^1_0\textrm{n}$

To calculate Y:

Total mass on reactant side = total mass on product side

$\Rightarrow 244=134+107+(Y\times 1)\\\\\Rightarrow Y=244-241=3$

Hence, 3 neutrons are produced in the above nuclear reaction.

4 0

3 years ago

What happens when samples of matter interact?

liberstina [14]

Answer: matter and its interaction with energy. Matter has mass and occupies space. A Substance is matter that cannot be separated into other kinds of matter by physical means.

Explanation:

7 0

2 years ago

Compare the structure and function of rhizoids and stolons? please help I need this answer for science

ladessa [460]

structural difference between Rhizoids and stolons
Rhizoids are root like structure organs while stolons are a specialized type of horizontal above the ground

functional difference
Rhizoids absorb water and nutrient , They keep plant attached on the soil while stolons are propagation of the plant.

7 0

3 years ago