periodic table
the number of valence electrons in group 1 elements is
1
In Period 3 there are 8 elements. How many of these elements have electrons in the d sublevel?
10
period 4 contains 18 elements. how many of theses elements have electrons in the d sublevel?
10
The atomic number of lithium, the first element in group 1, is 3. The atomic number of the second element in this group is?
11
How many elements are in the periodic table in which only s and p sublevels are filled?
3
aluminum is in period?
3
krypton, atomic number 36, is the fourth element in Group 18. What is the atomic number of xenon, the 5th element in group 18?
54
Cesium is in period
6
The number of valence electrons in group 17 elements is
7
Barium, atomic number 56, is the fifth element in Group 2. what is the atomic number of radium the next element in group 2?
88
a horizontal row of blocks in the periodic table is called a (n) ?
Period
Potassium and bromine belong to?
Period 4
What are the radioactive elements with the atomic numbers from 90 to 103 called?
The actinides
What are the elements with atomic numbers from 58 to 71 called?
The nobel gases
The period of an element can be determined from its
electron configuration
neutral atoms with the hightest energy level belong in which block of the periodic table ?
f-block
what group does nitrogen belong?
group 15
which group do flourine and chlorine belong?
halogen
hydrogen is placed sepratley from other elements in the periodic table because it
has many unique properties
elements in which d-sublevel is being filled have the properties of
metals
Argon, krypton and exnon are
nobel gases
elements to the right side of the periodic table (p-block elements) have properties most associated with
nonmetals
The electron configuration of the nobel gases from neon to radon in the periodic table make these elements part of the
p block
calcium. atomic number 20, what period is calcium?
period 4
Elements in a group or column in the Periodic table can be expected to have similar ?
properties
in group 2 elements, the valence electrons are in sublevel?
s
which block in the periodic table contains the alkali metals?
s
