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
marta [7]
3 years ago
10

Elements have similar characteristics? Periodic TaBle oF The Elements

Chemistry
1 answer:
Ann [662]3 years ago
3 0

Answer:

See attachment.

Explanation:

Elements that are in the same group will definitely possess similar characteristics because they tend to have the same valence electron which determines their reactivity.

On a periodic table, elements in the same group can be found arranged on the same column in the periodic table.

Therefore the two elements that have similar characteristics are those two elements you can see on the same column in group 2. See the two elements indicated in the attachment below.

You might be interested in
Propose a 3-step reaction for the conversion of cyclopentene to propanedioic acid
Gnom [1K]

I
don't know because this is the question which I never heard

6 0
3 years ago
The mass of water in a single popcorn kernel was found to be 0.905 grams after it popped at a temperature of 175 °C. Using the i
Rus_ich [418]

Answer:

0.583 kilojoules

Explanation:

The amount of heat required to pop a single kernel can be calculated using the formula as follows:

Q = m × c × ∆T

Where;

Q = amount of heat (J)

m = mass of water (g)

c = specific heat capacity of water (4.184 J/g°C)

∆T = change in temperature

From the given information, m = 0.905 g, initial temperature (room temperature) = 21°C , final temperature = 175°C, Q = ?

Q = m × c × ∆T

Q = 0.905 × 4.184 × (175°C - 21°C)

Q = 3.786 × 154

Q = 583.044 Joules

In kilojoules i.e. we divide by 1000, the amount of heat is:

= 583.04/1000

= 0.583 kilojoules

8 0
3 years ago
Which is a diatomic molecule?<br><br> A)He<br><br> B)O2<br><br> C) NaCl<br><br> D)CuF2
katrin2010 [14]

Answer:

B. O2

Explanation:

3 0
3 years ago
Read 2 more answers
The pH of a 0.25 M aqueous solution of hydrofluoric acid, HF, at 25.0 °C is 2.03. What is the value of Ka for HF?
Mazyrski [523]
Last option that is none of above is right answer.
8 0
3 years ago
Read 2 more answers
If air is 80 percent nitrogen and 20 percent oxygen by volume what is density
Evgen [1.6K]
1 mol of any gas or mix of gases at STP conditions will have a volume of 22.4 L. Since the problem doesn’t said what are the conditions I will asume that are STP condition and the volume of one mole of the mix will have a volume of 22.4 L.

You may know that density is
D=m/v

In one mole of air I will have 80% of Nitrogen (N2) and 20% oxygen (O2).

So the mass of one mole of air will be

14 x2x0.80+16x2x0.20 = 22.4 g + 6.4 g = 28.8 g

D= 28.8/22.4 = 1.28 g/L

Of course if the temperature is higher the density will be smaller because the volume of one mole will be bigger and viceversa if the temperature decrease. Also if the pressure is different than one atm the volume of a mol will change.
5 0
3 years ago
Other questions:
  • The cycle repeats when the carbon stored in the atmosphere as carbon dioxide gas is taken in.
    11·2 answers
  • PLEASE I NEED HELP!!!!!!!!!!!!! I AM GIVING THE HIGHEST POINTS POSSIBLE! PLEASE, I AM FAILING, I JUST NEED HELP!!!!!!!!!!!!!!!!!
    12·2 answers
  • This is Science, if you can answer this, much appreciated :) Both questions a and b, thank you!! I need this asap :)
    13·1 answer
  • Which type of bond occurs when atoms complete their outermost electron shells by
    14·1 answer
  • True or False. Water pressure increases as you travel deeper.
    9·1 answer
  • Елементите от IА и IIА групи на Периодичната система
    6·1 answer
  • Please please please someone give me the answers to all of these our teacher is very bad at explaining things and we are all con
    11·1 answer
  • What is the electron configuration for an electrically neutral atom of beryllium (Be)?
    14·1 answer
  • From which source is pomace derived? (1 point)
    8·1 answer
  • The rate law for the reaction 3A --&gt; 2B is rate = k[A] with a rate constant of 0.0447 hr-1.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!