19

COVID-19 is most likely spread from...

• Looking at a person who has COVID-19

• Cough and sneeze droplets from a person who has COVID-19

• Hair left behind from a person who has COVID-19

• Being over 65

What is the atomic number of Potassium?

• 17

• 18

• 19

• 20

Which of the following elements has an atomic number of 19?

• Calcium

• Potassium

• Sodium

• Magnesium

How many protons are present in an atom with an atomic number of 19?

• 17

• 18

• 19

• 20

What is the electron configuration of an element with atomic number 19?

Tags

NGSS.HS-PS1-1

Which of the following isotopes has 19 neutrons?

What is the mass number of an isotope of Potassium with 19 protons and 20 neutrons?

• 38

• 39

• 40

• 41

Which of the following ions has 19 electrons?

In the periodic table, which group does the element with atomic number 19 belong to?

• Group 1

• Group 2

• Group 17

• Group 18

What is the most common oxidation state of the element with atomic number 19?

• +1

• +2

• +3

• 0