
Átomo
Science
9th Grade
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Um elemento químico possui em sua camada de valência a seguinte configuração eletrônica: 3s² 3p⁴.
Identifique o número atômico desse elemento.
2
8
16
20
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual das seguintes distribuições eletrônicas representa um átomo de nitrogênio (N), que possui número atômico Z = 7?
1s² 2s² 2p⁵
1s² 2s² 2p³
1s² 2s³ 2p²
1s² 2s² 3s¹ 2p²
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
O número máximo de elétrons que podem ocupar o subnível d é:
2
6
10
14
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A distribuição eletrônica do íon potássio (K⁺), que perdeu um elétron do átomo de potássio (Z = 19), é isoeletrônica com qual dos seguintes gases nobres?
Neônio (Ne, Z = 10)
Argônio (Ar, Z = 18)
Criptônio (Kr, Z = 36)
Xenônio (Xe, Z = 54)
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Um átomo neutro possui a seguinte distribuição eletrônica em sua camada de valência: 4s². Qual é o número atômico desse elemento?
2
4
18
20
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A distribuição eletrônica do átomo de flúor (F, Z=9) é 1s² 2s² 2p⁵. Qual será a distribuição eletrônica do íon fluoreto (F⁻)?
1s² 2s² 2p⁴
1s² 2s² 2p⁶
1s² 2s¹ 2p⁶
1s² 2s² 3s¹
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Um íon com carga +2 possui 10 elétrons. Qual é o número atômico do elemento que originou esse íon?
8
10
12
14
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