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
andrew11 [14]
3 years ago
5

Can someone help me with this pls

Chemistry
2 answers:
diamong [38]3 years ago
7 0
The chemical elements are arranged in order of increasing atomic number. Answer A.
grandymaker [24]3 years ago
4 0

Answer:

i think the correct answer is A

You might be interested in
In which pair do both compounds exhibit predominantly ionic bonding? A) KCl and CO2 B) SO2 and BaF2 C) F2 and N2O D) N2O3 and Rb
gtnhenbr [62]

Answer:

E) NaF and SrO

Explanation:

The ionic bonding occurs between atoms with a great difference in electronegativity. This usually happens between a metal and a non-metal.

<em>In which pair do both compounds exhibit predominantly ionic bonding? </em>

A) KCl and CO₂. NO. C and O are non-metals and present covalent bonding.

B) SO₂ and BaF₂. NO. S and O are non-metals and present covalent bonding.

C) F₂ and N₂O. NO. Both compounds contain non-metals and present covalent bonding.

D) N₂O₃ and Rb₂O. NO. N and O are non-metals and present covalent bonding.

E) NaF and SrO. YES. Na and Sr are metals while F and O are non-metals.

5 0
3 years ago
A radioisotope decays to give an alpha particle andPb-208.
oee [108]

<u>Answer:</u> The original element is _{84}^{212}\textrm{Po}

<u>Explanation:</u>

Alpha decay is defined as the process in which alpha particle is emitted. In this process, a heavier nuclei decays into a lighter nuclei. The alpha particle released carries a charge of +2 units.

The released alpha particle is also known as helium nucleus.

_Z^A\textrm{X}\rightarrow _{Z-2}^{A-4}\textrm{Y}+_2^4\alpha

For the given alpha decay process of an isotope:

^{Z}_{A}\textrm{X}\rightarrow ^{208}_{82}\textrm{Pb}+_2^4\alpha

<u>To calculate A:</u>

Total mass on reactant side = total mass on product side

A = 208 + 4

A = 212

<u>To calculate Z:</u>

Total atomic number on reactant side = total atomic number on product side

Z = 82 + 2

Z = 84

The isotopic symbol of unknown element is _{84}^{212}\textrm{Po}

Hence, the original element is _{84}^{212}\textrm{Po}

3 0
3 years ago
Help! help! plz............
zhuklara [117]
There the picture is the answer from the internet

8 0
3 years ago
20 points I will give you brainliest if you answer in 5 mins
snow_lady [41]

Answer:Light bounces off of the mirror and then appears to come from behind the mirror.

Explanation:Plane mirrors form images that are virtual, upright and the same size and shape as the object it is reflecting.

When rays of light from the object hits a plane mirror they bounces off the mirror,that is they undergo reflection, and appear to originate from behind the mirror, resulting to the formation of a virtual image.

The image formed appears to be behind the plane in which the mirror lies. A virtual image is an image that is formed at a location from which the rays of light appear to come from. The image can not be formed on a screen..

4 0
2 years ago
Consider the following information.
brilliants [131]

Answer:

The molecular formula for A is C2H4(NO3)2

The molecular formula for B is C2H6O2

Explanation:

I linked an image that will show the work.

3 0
3 years ago
Other questions:
  • Are all acids dangerous? Give at least two examples to show what you mean.
    14·1 answer
  • The kinetic-molecular theory of gases says A. the particles of a gas move independently of each other. B. the particles in a gas
    14·1 answer
  • Why is a quantitative observation more useful than a non-quantitative one? Which of the following are quantitative?
    12·1 answer
  • an electron travels in a vacuum tube that is 2 meters in length .002 seconds what is the average speed of the electron during th
    15·2 answers
  • According to the article, HOW has the discovery of
    13·1 answer
  • I really need help with this​
    11·1 answer
  • Oxidation number of Ni in Ni(CO)4 is​
    11·1 answer
  • which of the following is not a valid conversion factor? A.) 60seconds/1minute B.) 12hours/1day C.) 1dozen/12 cookies D.) 1yard/
    15·1 answer
  • Describe how covalent bonds form
    14·1 answer
  • Please help with this question!
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!