The shorthand notation for fluorine- 19 is...?

Which contribution added to rutherfords discovery of a positive nucleus atoms are invisible electrons are scattered in an atom n

dedylja [7]

Answer:

neutrons are inside the nucleus

Explanation:

The most significant contribution that added to Rutherford's discovery of a positive nucleus is that neutrons are also inside the nucleus.

The discovery of neutrons as a nuclear particle was instrumental to Rutherford's discovery.
Since during his experiment, the alpha particles were deflected partly, he suggested a massive nucleus made up of just protons.
With the discovery of the neutron, the mass of the nucleus was enough to cause the deflection.

5 0

3 years ago

An aqueous solution has a hydrogen-ion concentration of 5.0 x 10^-6M.

andrey2020 [161]

Answer: 5.3

Explanation:

i took the test and got a 100 hope this helps :)

5 0

3 years ago

How many atoms of phosphorus are in 7.00 mol of copper(II) phosphate?

Rama09 [41]

<u>Answer:</u> The number of phosphorus atoms in given amount of copper(II) phosphate is $8.431\times 10^{24}$

<u>Explanation:</u>

We are given:

Moles of copper(II) phosphate $Cu_3(PO_4)_2$ = 7.00 mol

1 mole of copper(II) phosphate contains 3 moles of copper, 2 moles of phosphorus and 8 moles of oxygen atoms

Moles of phosphorus in copper(II) phosphate = $(2\times 7.00mol$

According to the mole concept:

1 mole of a compound contains $6.022\times 10^{23}$ number of particles

So, 7.00 moles of copper(II) phosphate will contain = $(2\times 7\times 6.022\times 10^{23}=8.431\times 10^{24}$ number of phosphorus atoms.

Hence, the number of phosphorus atoms in given amount of copper(II) phosphate is $8.431\times 10^{24}$

3 0

3 years ago

Choose any metal atom from Group 1A, 2A, or 3A. What charge will it adopt when it ionizes?

Ksenya-84 [330]

Answer:

Positive charge.

Explanation:

Hello!

In this case, since elements belonging to groups 1A, 2A and 3A are mostly metals, we infer they have the capacity to lose electrons and therefore they become positively charged.

Some examples may be:

$Na^+\\\\H^+\\\\Ca^{2+}\\\\Al^{3+}\\\\Sr^{2+}$

Best regards!

6 0

3 years ago

1(a). What is the solubility of calcium chloride (CaCl2) at 5°C?

In-s [12.5K]

Answer:

60 g/100 g water

Explanation:

Find 5 °C on the horizontal axis.

Draw a line vertically from that point until you reach the solubility curve for CaCl₂.

Then draw a horizontal line from there to the vertical axis.

The solubility of CaCl₂ is 60 g/100 g water.

7 0

3 years ago