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the atomic number in an element is the amount of protons it contains in the atom

Answered by Anonymous | 2024-06-10

The atomic number tells you how many protons are in an element.

Answered by asianangel9 | 2024-06-10

The atomic number indicates the number of protons in the nucleus of an atom of an element. It uniquely identifies an element and is fundamental in determining its chemical properties. In a neutral atom, the number of protons equals the number of electrons, balancing charges and influencing the atom's behavior in reactions.
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Answered by Anonymous | 2025-06-13

Jawaban:Memahami masalah - Suku pertama pada barisan di atas = U1 = 2 = a- Suku kedua pada barisan di atas = U2 = 4 = a + b- Suku ketiga pada barisan di atas = U3 = 6 = a + 2b- Suku keempat pada barisan di atas = U4 = 8 = a + 3b Sehingga, - U5 = 10 = a + 4- U6 = 12 = a + 5- U7 = 14 = a + 6- U8 = 16 = a + 7- U9 = 18 = a + 8- U10 = 20 = a + 9- Jumlah 4 suku pertama pada barisan tersebut = 2 + 4 + 6 + 8 = 20 = S4- Jumlah 10 suku pertama pada barisan tersebut = 2 + 4 + 6 + 8 + 10 + 12 + 14 + 16 + 18 + 20 = 110 = S10 Merencanakan pemecahannya S4 = U1 + U2 + U3 + U4 S4 = a + (a + b) + (a + 2b) + (a + 3b) S4 = 4a + 6b S4 = 2 (2a + 3b) S4 = 4/2 (a + (4-1)b) S10 = U1 + U2 + U3 + U4 + U5 + U6 + U7 + U8 + U9 + U10 S10 = a + (a + b) + (a + 2b) + (a + 3b) + (a + 4b) + (a + 5b) + (a + 6b) + (a + 7b) + (a + 8b) + (a + 9b) S10 = 10a + 45b S10 = 5 (2a + 9b) S10 = 10/2 (2a + (10-1)b) Menyelesaikan masalah sesuai rencana langkah kedua Jelas pada S4, n = 4, a = 2, b = 2 Jelas pada S10, n = 10, a = 2, b = 2 maka, Sn = n/2 (2a + (n-1)b) Memeriksa kembali hasil yang diperoleh Jadi, rumus Sn = n/2 (2a + (n-1)b)

Answered by ara1412 | 2025-08-16