All categories

3 years ago

What is the correct relationship of these elements regarding their ionization energy?

Chemistry

1 answer:

Mariana [72]3 years ago

5 0

Answer:

Sr<Ca<Be

Explanation:

Br, Ca, and Sr are all elements of same group as they all have 2 valence electrons. As we move down in a group, a new shell is being added that increases the size of the atom. As the size of an atom increases, it is easy to remove the electron from it's outer most shell in it's gaseous state. Since, Be is above Ca and Ca is above Sr. The size increases in the order, Be < Ca < Sr. It means Be is the smallest one of them and so it's hard to remove from it's outer most shell and hence it's ionization energy is higher.

Sr is largest one in these three elements and so it's easy to remove outer most electron from it that means the ionization energy is least. Ca is between Be and Sr.

So, an increasing order of ionization energy is Sr<Ca<Be

mark brainliest:)

You might be interested in

Which of the following best matches a part of a living cell with the function it performs?

ryzh [129]

1 is the ans definitely

4 0

4 years ago

Read 2 more answers

Activity 7: Crossword Puzzle

Ivenika [448]

Answer:

Across

2. Conduction.

3. Plates

4. Convection

5. Subduction

7. Earthquake

Down

1. Radioactive

6. Radiation

8. Sink

9. Slabpull

The clues are;

Across:

2. air molecules come in contact with warmer molecules

3. crust are made up of puzzle - like landmass called_____

4. rising and falling movement of material in the mantle

5. when tectonic plates push with each other

7. it is the result of movement of earth's plate

Down:

1. elements that play a vital role in Earth's internal heat

6. least important mode of heat transport

8. warm material rise; cool material______

9. heats build up underneath the crust

4 0

3 years ago

The electron configuration for nitrogen is 152 2s22p3. When N2 forms,

True [87]

Answer:

N2 has a triple bond with its Lewis structure. Nitrogen has 5 valence electrons. Two nitrogen's have a total of 10 valence electrons. There will be 6 valence electrons that are unequally shared. We move them in the middle. Therefore, Each nitrogen gives three pairs of electrons to the to the other nitrogen atom. N2 has a total of 8 electrons which completes the octet rule.

Explanation:

Hope it helped!

4 0

3 years ago

What is the chemical formula for iron(2) oxide

solmaris [256]

Iron (II) oxide is composed of iron with an oxidation number of +2 (shown by the II after iron) and an oxygen that has an oxidation number of -2 (oxygen almost always has an oxidation state of -2). Since the anion and cation both have a charge of +or- 2, they bond with each other with a 1 to 1 ratio and the formula should be FeO

I hope this helps. Let me know if anything is unclear.

7 0

3 years ago

17. How many moles are there in a sample containing 1000 molecules of H2O?18. If you wanted a sample of H2O containing 6 x 23mol

Viefleur [7K]

17) mol of $H_{2}O$ = $\frac{no. of molecule}{L}$
= $\frac{1000 molecules}{6.03 * 10^{23} molecules/mol }$
= 1.658 *    $10^{-21} mol$

18) mol = $\frac{molecule}{L}$
   $\frac{Mass}{Mr} = \frac{Molecule}{L}$
Let mass of oxygen = x
   $\frac{x}{(2 * 1) + (16)} = \frac{6 * 10^{23} }{6.03 * 10^{23} }$
$x = (6 * 10^{23} ) (18 g/ mol)$
= 17.9 g

3 0

4 years ago