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BaLLatris [955]
2 years ago
15

Find the block labeled ? in Figure 2. What is its atomic number? How many valence electrons does it have? Which of the elements

shown in Figure 2 will it most resemble?

Chemistry
2 answers:
ra1l [238]2 years ago
7 0
That is Magnesium. its atomic number is 12 and has 2 valence electrons. it will most resemble beryllium (Be)
Vadim26 [7]2 years ago
4 0

The atomic number of the element is 12. The name of the element is magnesium. It has two valence electrons. The element it most resemble is Be, beryllium.

looking at the periodic table given in the question, we can see that the element we are looking for belong to group 2, thus, its properties will be similar to that of Be, which belong to the same group. The electronic configuration of magnesium is 2, 8, 2, this implies that, it has two electrons on its outermost shell.

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Explanation:

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The electron configuration belonging to the atom with the highest second ionization energy is ________.
Gemiola [76]

Answer:

Element Lithium

Explanation:

The element with the highest second ionization energy is lithium. It belongs to the alkaline metal group I.e group one metals

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5 0
3 years ago
43 milliliters of water weighs 43 g. what is the density of the water?
Anastaziya [24]

Answer:

\rho =1g/mL

Explanation:

Hello,

In this case, since the density is defined as the ratio between the mass and the volume as shown below:

\rho =\frac{m}{V}

We can compute the density of water for the given 43 g that occupy the volume of 43 mL:

\rho =\frac{43g}{43mL}=1g/mL

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