Chemistry Topics Revision

What are the groups in the periodic table?

• A row of similar elements
• A column of similar elements
• The boxes in the table

How many protons, neutrons and electrons are there in a ²⁷Al₁₃ atom

• 13 protons, 27 neutrons and 14 electrons
• 13 protons, 27 neutrons and 13 electrons
  13 protons, 27 neutrons and 13 electrons
• 13 protons, 14 neutrons and 13 electrons

Tags

NGSS.MS-PS1-1

Which of the following does the nucleus contain?

• protons and electrons
• protons and neutrons
• neutrons and electrons
  neutrons and electrons

Tags

NGSS.HS-PS1-8

Which of the following statements is correct?

• Protons are positively charged and neutrons are negatively charged.
• Protons are negatively charged and electrons are positively charged.
• Protons are positively charged and electrons are negatively charged.

What is the atomic number of an atom?

• The number of atoms it contains.
• The number of protons it contains.
• The number of neutrons it contains.

Which electronic structure is correct for an element with 17 electrons?

• 1,7
• 10,7
• 2,8,7

Tags

NGSS.HS-PS1-1

Two elements have these electronic structures: 2,1 and 2,8,1. What can you say about the elements?

• They are both in Group 1.
• They are both in Group 2.
• They are both in period 2.

Tags

NGSS.HS-PS1-1

What do the elements in a group have the same number of?

• electrons
• occupied energy levels or shells
• electrons in the highest occupied energy level or outer shell

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What do the elements in a period have the same number of?

• electrons
• occupied energy levels or shells
• electrons in the highest occupied energy level or outer shell

Tags

NGSS.HS-PS1-1

Which of these electronic structures belongs to a noble gas?

• 2
• 2,2
• 2,8,2

Tags

NGSS.HS-PS1-1