Mwanafunzi, weka swali linalokusumbua ili walimu na wazoefu wakusaidie

frank rweyemamu said:

lakini naombeni msaada wa swali ili

X + Y = 7
Log27base X + Log16baseY = 5

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Teknocrat said:

xx+y=7⇒
y=7−x

Ingiza humu
logx27+logy16=5⇒logx27+(log7−x)16=5


Haya malizia….

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Foffana said:

Hapa umeenda chaka mkuu

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Baba mtakatifu91 said:

WADAU MSAADA WA KUNISOLVIA KWENYE KARATASI KAMA HITOJALI ILI NIELEWE
1.Write the electronic configuration of an atom with 25 electrons.

2.State the period and group of an element with atomic number 30.

3.An element X has the electronic configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁵
(a) Identify the element.
(b) State its atomic number.

4.Explain why the electronic configuration of Copper (Z = 29) is:
1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹ 3d¹⁰
and not 4s² 3d⁹.

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1. Write the electronic configuration of an atom with 25 electrons.​

2. State the period and group of an element with atomic number 30.​

Period​

Group​

3. An element X has the electronic configuration:​

(a) Identify the element.​

(b) State its atomic number.​

4. Explain why the electronic configuration of Copper (Z = 29) is:​

Muhtasari wa Majibu​

Mstahiki Mea said:

Haya maswali yanahusu electronic configuration. Tuyaweke hatua kwa hatua kama kwenye karatasi ya mtihani.

1. Write the electronic configuration of an atom with 25 electrons.​

Atom yenye elektroni 25 ina atomic number 25, ambayo ni element ya Manganese (Mn).
Mpangilio wa elektroni:
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁵
Au kwa kifupi:
[Ar] 4s² 3d⁵

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2. State the period and group of an element with atomic number 30.​

Atomic number 30 ni Zinc.
Electronic configuration:
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰

Period​

Namba kubwa zaidi ya energy level ni 4 (4s²).
Period = 4

Group​

Kwa transition elements:
Group = electrons za (n−1)d + ns
= 10 + 2
= 12
Group = 12
Jibu: Period 4, Group 12.

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3. An element X has the electronic configuration:​

1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁵

(a) Identify the element.​

Jumla ya elektroni:
2 + 2 + 6 + 2 + 6 + 2 + 5 = 25
Atomic number = 25
Element ni Manganese (Mn).

(b) State its atomic number.​

Atomic number = 25

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4. Explain why the electronic configuration of Copper (Z = 29) is:​

1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹ 3d¹⁰
and not 4s² 3d⁹.
Kwa kawaida tungetarajia:
[Ar] 4s² 3d⁹
Lakini atomu ya Copper hupanga elektroni zake kuwa:
[Ar] 4s¹ 3d¹⁰
kwa sababu 3d¹⁰ ni subshell iliyojazwa kikamilifu (fully filled d-subshell) na huwa imara zaidi (more stable) kuliko 3d⁹.
Kwa hiyo elektroni moja kutoka 4s huhamia 3d ili kufanya 3d iwe na elektroni 10 kamili.
Jibu la maelezo:
Copper has the configuration 4s¹ 3d¹⁰ because a completely filled 3d-subshell (3d¹⁰) is more stable than a partially filled 3d⁹ subshell. Therefore, one electron moves from the 4s orbital to the 3d orbital, giving the more stable arrangement 4s¹ 3d¹⁰.

Muhtasari wa Majibu​

Swali	Jibu
1	1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁵
2	Period 4, Group 12
3(a)	Manganese (Mn)
3(b)	Atomic number 25
4	Copper has 4s¹ 3d¹⁰ because a fully filled 3d-subshell is more stable than 4s² 3d⁹. Chanzo : AI

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