3 years ago

What is the electron configuration of an element with an atomic number of 9?

1 answer:

8 0

1s^2 2s^2 2p^5

First shell is s with capacity 2, second is p with capacity 6

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GenaCL600 [577]

It's B Covalent.Now I'll add more words since the thing says I need to write at least 20 characters.

4 0

3 years ago

Hitman42 [59]

$d=\frac{m}{V} \ \ \ \Rightarrow \ \ m=dV\\\\
d=620\frac{g}{cm^{3}}\\
V=75cm^{3}\\\\\
m=620\frac{g}{cm^{3}}*75cm^{3}=46500g$

6 0

3 years ago

dolphi86 [110]

25 mL
i could be wrong but hope it helps

3 0

2 years ago

deff fn [24]

Answer:

2.8g/cm³

Explanation:

Given parameters:

Mass of cube = 42g

Volume of cube = 15cm³

Unknown:

Density of the cube = ?

Solution:

Density is defined as the mass per unit volume of a substance. It is mathematically expressed as:

Density = $\frac{mass}{volume}$

So;

Density = $\frac{42}{15}$ = 2.8g/cm³

6 0

2 years ago

Galina-37 [17]

I hope this is the answer that you are looking for .

6 0

3 years ago