2 years ago

If an atom has three shell and number of valence electrons are two. Is this element metal

Chemistry

1 answer:

cluponka [151]2 years ago

3 0

Answer:

Metal

Element: Calcium

Valency: 2

Explanation:

To find the element, let's use the periodic table. (Look below)

We already went past 3 shells, just need the 2 electrons after it.

Just skip to the 4th row and count 2 to the right

We end up at Calcium.

Calcium is a metal and we're also on the alkaline earth metals column.

Calcium will need to lose 2 electrons to reach stability, so the valency is 2.

You might be interested in

How many joules of energy are made by the loss of 100kg of mass using the formula E=mc2? please help!!!

asambeis [7]

Answer:

E = 3 × 10¹⁰ J

Explanation:

Mass, m = 100 kg

We need to find energy made by the loss of 100 kg of mass. The formula between the mass and energy is given by :

E = mc²

Where c is speed of light

Putting all the values, we get :

E = 100 kg × (3×10⁸ m/s)²

= 3 × 10¹⁰ J

So, the required energy is 3 × 10¹⁰ J.

6 0

2 years ago

Interpolate: Use the equation to determine what the student enrollment in 2003 likely was.

sdas [7]

Answer:

1244 students

Explanation:

That would be y = 82*3 + 998

= 1244.

5 0

3 years ago

Read 2 more answers

There are 0.3 moles of xenon gas in a 0.5-liter container at 30 degrees C. What is the pressure exerted by the xenon gas

Kaylis [27]

PV = nRT
P = (nRT)/V
P = (0.3 mol × 0.08206 atm-l/(mol-K) × (273.15 + 30) K)/(0.5 l)
P = 14.9258934 atm

3 0

2 years ago

Read 2 more answers

What is the term that describe two species living together

Sergeu [11.5K]

I think it is <span>Symbiosis. But I dont know how to explain it</span>

3 0

2 years ago

Read 2 more answers

Given the equation I = Q/t, solve for t.

larisa86 [58]

Answer: $t=\frac{Q}{I}$

Explanation:

$I=\frac{Q}{t}$

Multiply by t on both sides.

$t*I=\frac{Q}{t}*t$

$tI=Q$

Now divide by I to isolate t.

$\frac{tI}{I}=\frac{Q}{I}$

$t=\frac{Q}{I}$

5 0

3 years ago