Physical Science

Take 10 Week #11

SPS 1- Atomic Structure

Day 1 Question 1

The three fundamental particles of the atom are

A. Mesons, Quarks and Anti-neutrino

B. Positron, Neutrino & Gamma Rays

C. Proton, Neutron and Electron D. Nucleus, Anti-quarks and

Electrons

Day 1 Question 2

The smallest particle of an element which can take part in chemical reactions and may or may not exist independently is the

A. neutron B. atom C. nucleus D. compound

Day 1 Answers

1. The three fundamental particles of the atom are

C. Proton, Neutron and Electron

2. The smallest particle of an element which can take part in chemical reactions and may or may not exist independently is the

B. atom

Day 2 Question 1

What distinguishes atoms of different elements?

A. number of protons plus neutrons

B. number of protons in an element's nucleus

C. number of neutrons D. number of electrons

Day 2 Question 2

 In the electron cloud model of the atom, what does the electron cloud represent?

A. a cloud of many tiny electrons surrounding an atom

B. the probable location of electrons within an atom

C. layered clouds of electrons resembling a tiny atmosphere within an atom

D. a cloud of electrons scattered throughout a positively charged nucleus

Day 2 Answers

1. What distinguishes atoms of different elements?

B.number of protons in an element's nucleus

2.  In the electron cloud model of the atom, what does the electron cloud represent?

B. the probable location of electrons within an atom

Day 3 Question 1

The mass number of an atom is equal to the number of

A. electrons and protons. B. electrons and isotopes. C. isotopes and neutrons.

D. protons and neutrons.

Day 3 Question 2

An isotope of phosphorus contains 15 electrons, 15 protons, and 17 neutrons. What is the name of this isotope?

A. phosphorus-15 B. phosphorus-30 C. phosphorus-32 D. phosphorus-47

Day 3 Answers

1. The mass number of an atom is equal to the number of

D. protons and neutrons.

2. An isotope of phosphorus contains 15 electrons, 15 protons, and 17 neutrons. What is the name of this isotope?

C. phosphorus-32

Day 4 Question 1How are isotopes of the same

element different? A. They have different numbers of

protons. B. They have different numbers of

neutrons. C. They have different physical

properties. D. They have different chemical

properties.

Day 4 Question 2

What force is primarily responsible for holding electrons around the nucleus of an atom?

A. gravity B. electromagnetic force C. strong force D. weak force

Day 4 Answers

1. How are isotopes of the same element different? .

B. They have different numbers of neutrons.

2. What force is primarily responsible for holding electrons around the nucleus of an atom?

B. electromagnetic force

Day 5 Question 1

Which of the following statements best explains why potassium (K) reacts easily with bromine (Br)?

A. Potassium and bromine both have valence electrons in the fourth energy level.

B. Potassium and bromine have the same number of electrons in their highest energy levels.

C. Potassium has one electron in its highest energy level, and bromine needs one electron to complete its highest energy level.

D. Potassium needs one electron to complete its highest energy level, and bromine has an extra electron in its highest energy level.

Day 5 Question 2

Which element has the electron configuration 2, 5?

A. boronB. nitrogenC. fluorineD. phosphorus

Day 5 AnswersWhich of the following statements best

explains why potassium (K) reacts easily with bromine (Br)?

C. Potassium has one electron in its highest energy level, and bromine needs one electron to complete its highest energy level.

2. Which element has the electron configuration 1s=2 2s=2 2p=3?

B. nitrogen