Complete the following table for neutral atoms Name of Element Symbol Atomic Num
ID: 844970 • Letter: C
Question
Complete the following table for neutral atoms Name of Element Symbol Atomic Number Mass Number Number of Protons Number of Neutrons Number of Electrons magnesium Br 80 24 38 50 14 16 19 39 Consider the following atoms in which the chemical symbol of the element is represented by X. 16 16 18 17 18 x x x x 8 9 10 8 8 1. What atoms have the same number of protons. 2. Which atoms are isotopes? Of what element? 3. Which atoms have the same mass number? 4 What atoms have the same number of neutrons? Of the elements K, Mg, Si, S, CI and Ar, which 1. has the largest atomic size? 2. is a halogen? 3. has an electron arrangement 2, 8, 6? 4. has the smallest atomic size? 5. is in Group IVA (14)? 6. has the highest ionization energy? 7. is/are nonmetals?Explanation / Answer
37B
NAME OF ELEMENT
SYMBOL
ATOMIC NUMBER
MASS NO
NUMBER OF PROTON
NUMBER OF NUTRON
NUMBER OF ELECTRON
BROMINE
Br
35
80
35
45
35
MAGNESIUM
Mg
12
24
12
12
12
STRONSIUM
Sr
38
88
38
50
38
SILICON
Si
14
30
14
16
14
POTASSIUM
K
19
39
19
20
19
38A
LET X ARE LEBEL AS
A B C D E
1. A, D,E
2. (A,B) AND (C,E)
3 (A,B) AND (C,E)
4. A,C
38.B
1. K
2.Cl
3 . S
4. Cl
5 Si
6.Ar
7. S, Si , Cl, Ar
NAME OF ELEMENT
SYMBOL
ATOMIC NUMBER
MASS NO
NUMBER OF PROTON
NUMBER OF NUTRON
NUMBER OF ELECTRON
BROMINE
Br
35
80
35
45
35
MAGNESIUM
Mg
12
24
12
12
12
STRONSIUM
Sr
38
88
38
50
38
SILICON
Si
14
30
14
16
14
POTASSIUM
K
19
39
19
20
19