QuestionComplete the symbols for these atoms: 28 protons & 30 neutrons, 22 protons & 21 neutrons, 15 electrons & 19 neutrons, O with 10 neutrons, Cr with mass number 54.

Studdy Solution

STEP 1

Assumptions1. The atomic number of an atom is equal to the number of protons in its nucleus. . The mass number of an atom is equal to the sum of the number of protons and neutrons in its nucleus.
3. The atom is neutral, meaning the number of protons is equal to the number of electrons.

STEP 2

The symbol for an atom is written as $\,_{Z}^{A}X$ where- $Z$ is the atomic number (number of protons), - $A$ is the mass number (number of protons + number of neutrons), - $X$ is the chemical symbol.

STEP 3

For an atom that contains28 protons and30 neutrons, the atomic number $Z$ is28 and the mass number $A$ is $28 +30 =58$ .
The symbol for this atom is $\,_{28}^{58}X$

STEP 4

For an atom that contains22 protons and21 neutrons, the atomic number $Z$ is22 and the mass number $A$ is $22 +21 =43$ .
The symbol for this atom is $\,_{22}^{43}X$

STEP 5

For an atom that contains15 electrons and19 neutrons, because the atom is neutral, the number of protons is also15. So, the atomic number $Z$ is15 and the mass number $A$ is $15 +19 =34$ .
The symbol for this atom is $\,_{15}^{34}X$

STEP 6

For an oxygen atom with10 neutrons, the atomic number $Z$ is8 (because oxygen has8 protons) and the mass number $A$ is $8 +10 =18$ .
The symbol for this atom is $\,_{8}^{18}$

STEP 7

For a chromium atom with a mass number of54, the atomic number $Z$ is24 (because chromium has24 protons) and the mass number $A$ is54.
The symbol for this atom is $\,_{24}^{54}Cr$ The complete symbols for the atoms are- $\,_{28}^{58}X$ - $\,_{22}^{43}X$ - $\,_{15}^{34}X$ - $\,_{}^{18}$ - $\,_{24}^{54}Cr$

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QuestionComplete the symbols for these atoms: 28 protons & 30 neutrons, 22 protons & 21 neutrons, 15 electrons & 19 neutrons, O with 10 neutrons, Cr with mass number 54.

Studdy Solution

STEP 1

Assumptions1. The atomic number of an atom is equal to the number of protons in its nucleus. . The mass number of an atom is equal to the sum of the number of protons and neutrons in its nucleus.
3. The atom is neutral, meaning the number of protons is equal to the number of electrons.

STEP 2

The symbol for an atom is written as $\,_{Z}^{A}X$ where- $Z$ is the atomic number (number of protons), - $A$ is the mass number (number of protons + number of neutrons), - $X$ is the chemical symbol.

STEP 3

For an atom that contains28 protons and30 neutrons, the atomic number $Z$ is28 and the mass number $A$ is $28 +30 =58$ .
The symbol for this atom is $\,_{28}^{58}X$

STEP 4

For an atom that contains22 protons and21 neutrons, the atomic number $Z$ is22 and the mass number $A$ is $22 +21 =43$ .
The symbol for this atom is $\,_{22}^{43}X$

STEP 5

For an atom that contains15 electrons and19 neutrons, because the atom is neutral, the number of protons is also15. So, the atomic number $Z$ is15 and the mass number $A$ is $15 +19 =34$ .
The symbol for this atom is $\,_{15}^{34}X$

STEP 6

For an oxygen atom with10 neutrons, the atomic number $Z$ is8 (because oxygen has8 protons) and the mass number $A$ is $8 +10 =18$ .
The symbol for this atom is $\,_{8}^{18}$

STEP 7

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QuestionComplete the symbols for these atoms: 28 protons & 30 neutrons, 22 protons & 21 neutrons, 15 electrons & 19 neutrons, O with 10 neutrons, Cr with mass number 54.

Studdy Solution

STEP 1

Assumptions1. The atomic number of an atom is equal to the number of protons in its nucleus. . The mass number of an atom is equal to the sum of the number of protons and neutrons in its nucleus.3. The atom is neutral, meaning the number of protons is equal to the number of electrons.

STEP 2

The symbol for an atom is written as ZAX\,_{Z}^{A}XZA​Xwhere- ZZZ is the atomic number (number of protons), - AAA is the mass number (number of protons + number of neutrons), - XXX is the chemical symbol.

STEP 3

For an atom that contains28 protons and30 neutrons, the atomic number ZZZ is28 and the mass number AAA is 28+30=5828 +30 =5828+30=58.The symbol for this atom is 2858X\,_{28}^{58}X2858​X

STEP 4

For an atom that contains22 protons and21 neutrons, the atomic number ZZZ is22 and the mass number AAA is 22+21=4322 +21 =4322+21=43.The symbol for this atom is 2243X\,_{22}^{43}X2243​X

STEP 5

For an atom that contains15 electrons and19 neutrons, because the atom is neutral, the number of protons is also15. So, the atomic number ZZZ is15 and the mass number AAA is 15+19=3415 +19 =3415+19=34.The symbol for this atom is 1534X\,_{15}^{34}X1534​X

STEP 6

For an oxygen atom with10 neutrons, the atomic number ZZZ is8 (because oxygen has8 protons) and the mass number AAA is 8+10=188 +10 =188+10=18.The symbol for this atom is 818\,_{8}^{18}818​

STEP 7

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Assumptions1. The atomic number of an atom is equal to the number of protons in its nucleus. . The mass number of an atom is equal to the sum of the number of protons and neutrons in its nucleus.
3. The atom is neutral, meaning the number of protons is equal to the number of electrons.

The symbol for an atom is written as $\,_{Z}^{A}X$ where- $Z$ is the atomic number (number of protons), - $A$ is the mass number (number of protons + number of neutrons), - $X$ is the chemical symbol.

For an atom that contains28 protons and30 neutrons, the atomic number $Z$ is28 and the mass number $A$ is $28 +30 =58$ .
The symbol for this atom is $\,_{28}^{58}X$

For an atom that contains22 protons and21 neutrons, the atomic number $Z$ is22 and the mass number $A$ is $22 +21 =43$ .
The symbol for this atom is $\,_{22}^{43}X$

For an atom that contains15 electrons and19 neutrons, because the atom is neutral, the number of protons is also15. So, the atomic number $Z$ is15 and the mass number $A$ is $15 +19 =34$ .
The symbol for this atom is $\,_{15}^{34}X$

For an oxygen atom with10 neutrons, the atomic number $Z$ is8 (because oxygen has8 protons) and the mass number $A$ is $8 +10 =18$ .
The symbol for this atom is $\,_{8}^{18}$