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3 years ago

Hydrogen is a special ,because it can act like two groups,and_

Chemistry

1 answer:

LuckyWell [14K]3 years ago

5 0

Answer:

First and seventeenth group.

Explanation:

Hydrogen is a special case as it has only one electron in its outermost orbital.

The hydrogen can lose or can accept electron easily.

Thus it can form positive ion similar to alkali metals and negative ion similar to halogens.

Thus it can fall into two groups

a) I group [Alkali metals]

b) 17th Group [Halogens]

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When physical properties are measured their identity will be changed. True or False

wolverine [178]

Answer:

False

Explanation:

A physical change is a change to a sample of matter in which some properties of the material change, but the identity of the matter does not.

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3 years ago

Draw the electron configuration for a neutral atom of nitrogen.

velikii [3]

Answer:

1s22s22p3.

Explanation:

Electronic configuration of a neutral atom is 1s22s22p3.

Please see the image attached

Neutral atom of nitrogen will have equal number of proton and electron i.e equal to 7. 7 electron of the nitrogen are placed into the s and p orbitals in the ground state.

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2 years ago

20 points and brainliest for best answer

RSB [31]

Gold/Atomic mass

196.96657 u ± 0.000004 u

Potassium/Atomic mass

39.0983 u ± 0.0001 u

Francium/Atomic number

87

Copper/Atomic mass

63.546 u ± 0.003 u

Bromine/Atomic mass

79.904 u ± 0.001 u

Arsenic/Atomic number

33

7 0

3 years ago

Read 2 more answers

Part iii. Is the dissolution reaction of ammonium nitrate enthalpy favored?

lesya [120]

Answer:

No, it is not enthalpy favored since the chemical system gains energy.

Explanation:

The dissolution of ammonium nitrate in water is an endothermic process.

Endothermic process requires the system to gain energy to can dissolve the particles in water.

So, the reaction is not enthalpy favored.

3 0

3 years ago

Mature elephants consume an average of 600 pounds of food per day. If an elephant

MAXImum [283]

Answer:

$\large \boxed{\text{4 600 000 kg or 4600 Mg}}$

Explanation:

1. Calculate the adult life

If the elephant is an adult from its 10th birthday until the day before its 56th birthday, its

Adult life = 55 - 10 + 1 = 46 yr

2. Convert years to days

$\text{Adult life} = \text{46 yr} \times \dfrac{\text{365.25 da}}{\text{1 yr}} = \text{16 800 da}$

3. Convert days to pounds of feed

$\text{Feed} = \text{16 800 da} \times \dfrac{\text{600 lb}}{\text{1 da}} = 1.01 \times 10^{7} \text{ lb}$

4. Convert pounds to kilograms and megagrams

$\text{Feed} =1.01 \times 10^{7} \text{ lb} \times \dfrac{\text{1 kg}}{\text{2.20 lb}} =\textbf{4 600 000 kg} = \textbf{4600 Mg}\\\\\text{The elephant will eat $\large \boxed{\textbf{4 600 000 kg or 4600 Mg}}$ of food.}$

Note: The answer can have only two significant figures because that is all you gave for age of the elephant.

5 0

3 years ago

Hydrogen is a special ,because it can act like two groups,____and_____

Hydrogen is a special ,because it can act like two groups,and_