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
Bogdan [553]
4 years ago
15

An unknown element "x" can form a compound with the formula "x"br2. in which main group on the periodic table would element "x"

be found?
Chemistry
1 answer:
Hoochie [10]4 years ago
4 0
Group 2, or in the Alkaline Earth Metals section. This is due to the necessity to have a +2 charge to balance out or negate the -2 charge two Bromines carry.
You might be interested in
Which of the following would be most likely to experience strong intermolecular forces?
ryzh [129]

Answer:

The correct answer is D

Explanation:

Just took quiz

6 0
3 years ago
Can anyone help me on this please?
Bad White [126]
This question is testing to see how well you understand the "half-life" of radioactive elements, and how well you can manipulate and dance around them.  This is not an easy question.

The idea is that the "half-life" is a certain amount of time.  It's the time it takes for 'half' of the atoms in any sample of that particular unstable element to 'decay' ... their nuclei die, fall apart, and turn into nuclei of other elements.

Look over the table.  There are 4,500 atoms of this radioactive substance when the time is 12,000 seconds, and there are 2,250 atoms of it left when the time is ' y ' seconds.  Gosh ... 2,250 is exactly half of 4,500 !  So the length of time from 12,000 seconds until ' y ' is the half life of this substance !  But how can we find the length of the half-life ? ? ?

Maybe we can figure it out from other information in the table !

Here's what I found:

Do you see the time when there were 3,600 atoms of it ? 
That's 20,000 seconds.

... After one half-life, there were 1,800 atoms left.
... After another half-life, there were 900 atoms left.
... After another half-life, there were 450 atoms left. 

==>  450 is in the table !  That's at 95,000 seconds.

So the length of time from 20,000 seconds until 95,000 seconds
is three half-lifes.

The length of time is (95,000 - 20,000) = 75,000 sec

                                     3 half lifes = 75,000 sec

Divide each side by 3 :   1 half life = 25,000 seconds

There it is !  THAT's the number we need.  We can answer the question now.

==> 2,250 atoms is half of 4,500 atoms.

==> ' y ' is one half-life later than 12,000 seconds

==> ' y ' = 12,000 + 25,000

         y   = 37,000 seconds  .

Check: 
Look how nicely 37,000sec fits in between 20,000 and 60,000 in the table.

As I said earlier, this is not the simplest half-life problem I've seen.
You really have to know what you're doing on this one.  You can't
bluff through it.


7 0
3 years ago
HOW MANY M ARE IN 3.0X105 MM?
erik [133]

The answer to the question is 300meters.

7 0
3 years ago
question #5: corals are sensitive to temperature . if temperatures are raised , it will cause the coral to bleach . what does bl
larisa86 [58]

Answer:

coral bleaching is when the temperature of the water changes (even slight changes in temperature effect coral) and the coral reacts negatively to it causing it to die. unfortunately corals cannot recover once they have been bleached.  

3 0
3 years ago
Read 2 more answers
Consider the atom with the chemical symbol Ru.
Vinil7 [7]

Answer: 97

Explanation:

The element Ru is <u>Ruthenium</u> which has <u>44 protons</u>.

In this case, our atom is an isotope with <u>53 neutrons</u>.

With this information, we can use the mass number formula to find this atom's mass number.

mass number = protons + neutrons

mass number = <u>44 protons</u> + <u>53 neutrons</u>

mass number = <u>97</u>

4 0
1 year ago
Other questions:
  • PLEASE HELP ! Need help now ! Thank you in advance , will mark brainliest !!
    5·1 answer
  • An empty 3.00 l bottle weighs 1.70 kg. filled with a certain wine, it weighs 4.72 kg. the wine contains 11.5% ethyl alcohol by m
    13·1 answer
  • The Canby’s dropwort grows in wetlands in Georgia. It is an endangered plant because wetlands have been cleared for agriculture
    10·2 answers
  • Which one have less friction loss ?
    15·1 answer
  • The specific heat of aluminum is 0.125 cal/g °C. If 12.5 grams of aluminum were heated from 20.0 °C to 100.0 °C, calories of hea
    6·2 answers
  • Describe the change in energy that occurs as bonds are broken and formed
    5·1 answer
  • Express the frequency in inverse seconds of n=4 to n=3
    14·1 answer
  • True of False : animals eat other animals to get energy and building blocks to help them grow and repair.​
    10·2 answers
  • What are some differences between a family tree and evolutionary
    7·1 answer
  • What series does the following compound belong to?
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!