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2 years ago

1) This element has more than 50 but less than 75 protons and it is in Group 17.

1 answer:

6 0

<span>1) This element has more than 50 but less than 75 protons and it is in Group 17............IODINE (I)
2)This element has more electrons than oxygen but fewer electrons than neon........FLUORINE (F)
3)This element has an atomic number lower than that of aluminun but an atomic mass that is greater than sodium........MAGNESIUM (Mg)
4)This Group 2 element has fewer protons than bromine but more protons than sulfur..........CALCIUM (Ca)
5)This element has an atomic number that is one greater than platinum.............GOLD/AURUM (Au)</span>

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which of the following will stay consant, no matter if the substance is in the solid, liquid, or gas state

777dan777 [17]

Answer:

chemical composition

Explanation:

changes into any state of matter are physical and thus the chemical composition of the matter is unaltered

8 0

2 years ago

How do I explain this? I'm a little stuck. :/

Dimas [21]

Answer:

Not balance.

Explanation:

Chemical equation:

K + Cl₂ → KCl

The given equation is not balance because there are one potassium and two chlorine atoms on left side of equation while on right side there are one potassium and one chlorine atom present.

Balance chemical equation:

2K + Cl₂ → 2KCl

the equation is balance now because there are two potassium and two chlorine atoms on left side of equation and two potassium and two chlorine atoms are also present on right side.

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2 years ago

Match the symbol for each element with the name of the element. 1. hydrogen K 2. helium Mg 3. sodium He 4. magnesium H 5. potass

insens350 [35]

Answer:

1. hydrogen - H

2. helium - He

3. sodium - Na

4. magnesium - Mg

5. potassium - K

Explanation:

Hydrogen is the element of group 1 and first period. The atomic number of hydrogen is 1 and the symbol of the element is H.

The electronic configuration of the element hydrogen is:-

$1s^1$

Helium is the element of group 18 and first period. The atomic number of helium is 2 and the symbol of the element is He.

The electronic configuration of the element helium is:-

$1s^2$

Sodium is the element of group 1 and third period. The atomic number of sodium is 11 and the symbol of the element is Na.

The electronic configuration of the element sodium is:-

$1s^22s^22p^63s^1$

Magnesium is the element of group 2 and third period. The atomic number of magnesium is 12 and the symbol of the element is Mg.

The electronic configuration of the element magnesium is:-

$1s^22s^22p^63s^2$

Potassium is the element of group 1 and forth period. The atomic number of potassium is 19 and the symbol of the element is K.

The electronic configuration of the element potassium is:-

$1s^22s^22p^63s^23p^64s^1$

5 0

3 years ago

What is the balanced chemical equation when an aqueous solution of calcium hydroxide reacts with liquid water?

Dmitrij [34]

Explanation:

Equation for Calcium Hydroxide Dissolving in Water | Ca(OH)2 + H2O

7 0

2 years ago

WILL GIVE BRAINLIEST!! :)

svetlana [45]

Answer:

Explanation:

Nitrogen is a naturally occurring element that is essential for growth and reproduction in both plants and animals. It is found in amino acids that make up proteins, in nucleic acids, that comprise the hereditary material and life's blueprint for all cells, and in many other organic and inorganic compounds.

5 0

2 years ago

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