It's indeed 32 bit version of the OS.
I uninstalled chromium and tried again so I could copy-paste...
this is what i get now. It's different.
peter@peter-Pavilion-dv4000-EY774EA-UUG:~$ chromium-browser
Command 'chromium-browser' not found, but can be installed with:
sudo apt install chromium-browser
peter@peter-Pavilion-dv4000-EY774EA-UUG:~$ sudo apt install chromium-browser
[sudo] password for peter:
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following additional packages will be installed:
chromium-browser-l10n chromium-codecs-ffmpeg-extra
Suggested packages:
webaccounts-chromium-extension unity-chromium-extension
The following NEW packages will be installed:
chromium-browser chromium-browser-l10n chromium-codecs-ffmpeg-extra
0 upgraded, 3 newly installed, 0 to remove and 0 not upgraded.
Need to get 75,6 MB/80,6 MB of archives.
After this operation, 272 MB of additional disk space will be used.
Do you want to continue? [Y/n] y
Get:1 http://nl.archive.ubuntu.com/ubuntu bionic-updates/universe i386 chromium-browser i386 91.0.4472.101-0ubuntu0.18.04.1 [75,6 MB]
Fetched 75,6 MB in 34s (2191 kB/s)
Selecting previously unselected package chromium-codecs-ffmpeg-extra.
(Reading database ... 279962 files and directories currently installed.)
Preparing to unpack .../chromium-codecs-ffmpeg-extra_91.0.4472.101-0ubuntu0.18.04.1_i386.deb ...
Unpacking chromium-codecs-ffmpeg-extra (91.0.4472.101-0ubuntu0.18.04.1) ...
Selecting previously unselected package chromium-browser.
Preparing to unpack .../chromium-browser_91.0.4472.101-0ubuntu0.18.04.1_i386.deb ...
Unpacking chromium-browser (91.0.4472.101-0ubuntu0.18.04.1) ...
Selecting previously unselected package chromium-browser-l10n.
Preparing to unpack .../chromium-browser-l10n_91.0.4472.101-0ubuntu0.18.04.1_all.deb ...
Unpacking chromium-browser-l10n (91.0.4472.101-0ubuntu0.18.04.1) ...
Setting up chromium-codecs-ffmpeg-extra (91.0.4472.101-0ubuntu0.18.04.1) ...
Setting up chromium-browser (91.0.4472.101-0ubuntu0.18.04.1) ...
Setting up chromium-browser-l10n (91.0.4472.101-0ubuntu0.18.04.1) ...
Processing triggers for man-db (2.8.3-2ubuntu0.1) ...
Processing triggers for gnome-menus (3.13.3-11ubuntu1.1) ...
Processing triggers for hicolor-icon-theme (0.17-2) ...
Processing triggers for mime-support (3.60ubuntu1) ...
Processing triggers for desktop-file-utils (0.23-1ubuntu3.18.04.2+zorin1) ...
Processing triggers for libc-bin (2.28-0ubuntu1+zorin4) ...
W: Operation was interrupted before it could finish
peter@peter-Pavilion-dv4000-EY774EA-UUG:~$ sudo apt install chromium-browser
Reading package lists... Done
Building dependency tree
Reading state information... Done
chromium-browser is already the newest version (91.0.4472.101-0ubuntu0.18.04.1).
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
peter@peter-Pavilion-dv4000-EY774EA-UUG:~$
and of course when i wrote "chromium-browser" again it showed "illegal instruction" again. But this time i was expecting it...
Thanks in advance !