Worksheet: Atomic Structure

In this worksheet, we will practice describing the Bohr model of the atom and the particles that make up atoms.

Q1:

When an electron in an atom moves from a higher energy level to a lower energy level, it electromagnetic radiation.

  • Aabsorbs
  • Breleases

Q2:

If an atom has 4 protons, 3 neutrons, and 4 electrons, what is the relative charge of the atom?

Q3:

If an atom has 9 protons and 7 electrons, what is the relative charge of the atom?

Q4:

What is the relative charge of a proton?

Q5:

Are neutrons positively charged, negatively charged, or neutral?

  • ANeutral
  • BPositively charged
  • CNegatively charged

Q6:

If an ion has 14 electrons but a relative charge of +2, how many protons are in the nucleus of the ion?

Q7:

What are the 2 types of particles that make up the nucleus of an atom?

  • AProtons and neutrons
  • BProtons and electrons
  • CNeutrons and electrons

Q8:

What is the relative charge of an electron?

Q9:

In the nuclear model of the atom, does the nucleus have a positive charge, a negative charge, or no charge?

  • ANo charge
  • BNegative charge
  • CPositive charge

Q10:

What is the relative charge of a neutron?

Q11:

When an electron electromagnetic radiation, it moves to a higher energy level in the atom.

  • Areleases
  • Babsorbs

Q12:

Are electrons positively charged, negatively charged, or neutral?

  • ANegatively charged
  • BPositively charged
  • CNeutral

Q13:

If an atom has 7 protons and 7 electrons, what is the relative charge of the atom?

Q14:

If a charged atom has 8 protons in its nucleus but a relative charge of 2, how many electrons does it have?

Q15:

If a neutral atom has 12 protons in its nucleus, how many electrons does it have?

Q16:

What part of an atom contains most of its mass?

  • AThe protons only
  • BThe nucleus
  • CThe electron cloud
  • DThe neutrons only

Q17:

Which of the following statements about the structure of an atom is correct?

  • AAn atom consists of a positively charged nucleus, which contains protons and electrons, and a negatively charged neutron cloud surrounding the nucleus.
  • BAn atom consists of an electrically neutral nucleus containing protons and electrons.
  • CAn atom consists of a sphere of positive charge with electrons bound to its surface.
  • DAn atom consists of a negatively charged nucleus, which contains neutrons, and a positively charged proton cloud surrounding the nucleus.
  • EAn atom consists of a positively charged nucleus, which contains protons and neutrons, and a negatively charged electron cloud surrounding the nucleus.

Q18:

If a charged atom has 6 protons in its nucleus but a relative charge of +1 overall, how many electrons does the atom have?

Q19:

The image shows a diagram of an atom, which is not to scale.