Atomic structure * Flashcards Preview

Chemistry > Atomic structure * > Flashcards

Flashcards in Atomic structure * Deck (19)
Loading flashcards...
1
Q

Fill the gaps :

atoms ______ be broken down into anything simpler
the atoms of a given element are __________ to each other
the atoms of _________ elements are _________ from one another
during chemical reactions atoms _________ to make different substances

A

atoms cannot be broken down into anything simpler
the atoms of a given element are identical to each other
the atoms of different elements are different from one another
during chemical reactions atoms rearrange to make different substances

2
Q

What three smaller particles can atoms be broken down into?

A

protons, neutrons, electrons

3
Q

Fill the gaps :

atoms of an element have ___ _____ numbers of _______ and _________, but can have _________ numbers of ________
atoms of _________ elements have _________ numbers of _______ and ________

A

atoms of an element have the same numbers of protons and electrons, but can have different numbers of neutrons
atoms of different elements have different numbers of protons and electrons

4
Q

What is at the centre of an atom and what does it contain?

A

A nucleus containing protons and neutrons

5
Q

What surrounds the nucleus of an atom?

A

electrons arranged in shells

6
Q

What is the relative mass and charge of a proton?

A

relative mass = 1
relative charge = +1

7
Q

What is the relative mass and charge of a neutron?

A

relative mass = 1
relative charge = 0

8
Q

What is the relative mass and charge of an electron?

A

relative mass = 1/1835
relative charge = -1

9
Q

What is the atomic number of an atom?

A

the number of protons in the nucleus

10
Q

Fill the gaps :

all the atoms of a given element have the ____ atomic number
no two elements have the ____ atomic number
an atom contains _____ numbers of _______ and _________
since ______ and _________ have _____ and ________ charges, this means that atoms are ______ overall.

A

all the atoms of a given element have the same atomic number
the atomic number of each element is unique - no two elements have the same atomic number
an atom contains equal numbers of protons and electrons
since protons and electrons have equal and opposite charges, this means that atoms are neutral overall.

11
Q

What is the mass number of an atom?

A

the total number of protons and neutrons in the nucleus

12
Q

Where does the mass number appear on the periodic table?

A

at the top of the element

13
Q

Where does the atomic number appear on the periodic table?

A

at the bottom of the element

14
Q

How do you find the number of protons in an atom?

A

number of protons = atomic number

15
Q

How do you find the number of electrons in an atom?

A

number of electrons = atomic number

16
Q

How do you calculate the number of neutrons in an atom?

A

number of neutrons = mass number - atomic number

17
Q

What is an isotope?

A

atoms of an element that have the same number of protons, but a different number of neutrons in their nuclei

18
Q

Isotopes of the same element have :

the same…
different…

A

the same atomic number
different mass numbers

19
Q

Fill the gaps :

an isotope is named after the ________ and the ____ number of its atoms
for example, carbon-12 is an isotope of carbon with a mass number of __

A

an isotope is named after the element and the mass number of its atoms
for example, carbon-12 is an isotope of carbon with a mass number of 12